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Finding the Fourth Proportional to 5,691.49, 8,538.91 and 2,920.12

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Solution

The fourth proportional to 5,691.49, 8,538.91 and 2,920.12 is: 4,381.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,691.49 : 8,538.91 = 2,920.12 : x
  2. Step 2: Convert to fraction form
    5,691.49/8,538.91 = 2,920.12/x
  3. Step 3: Cross multiply
    5,691.49x = 8,538.91 × 2,920.12
  4. Step 4: Simplify right side
    5,691.49x = 24,934,613.22
  5. Step 5: Solve for x
    x = 24,934,613.22/5,691.49
  6. Step 6: Final answer
    x = 4,381.04

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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.