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Finding the Fourth Proportional to 6,685.26, 9,226.46 and 3,890.76

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Solution

The fourth proportional to 6,685.26, 9,226.46 and 3,890.76 is: 5,369.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,685.26 : 9,226.46 = 3,890.76 : x
  2. Step 2: Convert to fraction form
    6,685.26/9,226.46 = 3,890.76/x
  3. Step 3: Cross multiply
    6,685.26x = 9,226.46 × 3,890.76
  4. Step 4: Simplify right side
    6,685.26x = 35,897,941.51
  5. Step 5: Solve for x
    x = 35,897,941.51/6,685.26
  6. Step 6: Final answer
    x = 5,369.72

Related Problems

Find fourth proportional to 3,342.63, 4,613.23 and 1,945.38
Half scale
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Double scale
Find fourth proportional to 6,686.26, 9,227.84 and 3,891.76
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.