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Finding the Fourth Proportional to 30,387.70, 41,929.68 and 16,957.90

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Solution

The fourth proportional to 30,387.70, 41,929.68 and 16,957.90 is: 23,398.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,387.70 : 41,929.68 = 16,957.90 : x
  2. Step 2: Convert to fraction form
    30,387.70/41,929.68 = 16,957.90/x
  3. Step 3: Cross multiply
    30,387.70x = 41,929.68 × 16,957.90
  4. Step 4: Simplify right side
    30,387.70x = 711,039,320.47
  5. Step 5: Solve for x
    x = 711,039,320.47/30,387.70
  6. Step 6: Final answer
    x = 23,398.92

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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.