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Finding the Fourth Proportional to 5,805.69, 8,010.47 and 3,920.76

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Solution

The fourth proportional to 5,805.69, 8,010.47 and 3,920.76 is: 5,409.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,805.69 : 8,010.47 = 3,920.76 : x
  2. Step 2: Convert to fraction form
    5,805.69/8,010.47 = 3,920.76/x
  3. Step 3: Cross multiply
    5,805.69x = 8,010.47 × 3,920.76
  4. Step 4: Simplify right side
    5,805.69x = 31,407,110.75
  5. Step 5: Solve for x
    x = 31,407,110.75/5,805.69
  6. Step 6: Final answer
    x = 5,409.71

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Find fourth proportional to 2,902.85, 4,005.23 and 1,960.38
Half scale
Find fourth proportional to 11,611.38, 16,020.93 and 7,841.52
Double scale
Find fourth proportional to 5,806.69, 8,011.84 and 3,921.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.