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Finding the Fourth Proportional to 10,613.70, 15,920.55 and 2,716.20

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Solution

The fourth proportional to 10,613.70, 15,920.55 and 2,716.20 is: 4,074.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,613.70 : 15,920.55 = 2,716.20 : x
  2. Step 2: Convert to fraction form
    10,613.70/15,920.55 = 2,716.20/x
  3. Step 3: Cross multiply
    10,613.70x = 15,920.55 × 2,716.20
  4. Step 4: Simplify right side
    10,613.70x = 43,243,397.91
  5. Step 5: Solve for x
    x = 43,243,397.91/10,613.70
  6. Step 6: Final answer
    x = 4,074.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.