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Finding the Fourth Proportional to 7,991.89, 11,039.57 and 7,246.69

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Solution

The fourth proportional to 7,991.89, 11,039.57 and 7,246.69 is: 10,010.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.89 : 11,039.57 = 7,246.69 : x
  2. Step 2: Convert to fraction form
    7,991.89/11,039.57 = 7,246.69/x
  3. Step 3: Cross multiply
    7,991.89x = 11,039.57 × 7,246.69
  4. Step 4: Simplify right side
    7,991.89x = 80,000,341.52
  5. Step 5: Solve for x
    x = 80,000,341.52/7,991.89
  6. Step 6: Final answer
    x = 10,010.19

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Half scale
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Double scale
Find fourth proportional to 7,992.89, 11,040.95 and 7,247.69
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.