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Finding the Fourth Proportional to 20,613.18, 30,901.53 and 9,934.14

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Solution

The fourth proportional to 20,613.18, 30,901.53 and 9,934.14 is: 14,892.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.18 : 30,901.53 = 9,934.14 : x
  2. Step 2: Convert to fraction form
    20,613.18/30,901.53 = 9,934.14/x
  3. Step 3: Cross multiply
    20,613.18x = 30,901.53 × 9,934.14
  4. Step 4: Simplify right side
    20,613.18x = 306,980,125.23
  5. Step 5: Solve for x
    x = 306,980,125.23/20,613.18
  6. Step 6: Final answer
    x = 14,892.42

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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.