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Finding the Fourth Proportional to 30,387.91, 41,931.17 and 16,957.45

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Solution

The fourth proportional to 30,387.91, 41,931.17 and 16,957.45 is: 23,398.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,387.91 : 41,931.17 = 16,957.45 : x
  2. Step 2: Convert to fraction form
    30,387.91/41,931.17 = 16,957.45/x
  3. Step 3: Cross multiply
    30,387.91x = 41,931.17 × 16,957.45
  4. Step 4: Simplify right side
    30,387.91x = 711,045,749.93
  5. Step 5: Solve for x
    x = 711,045,749.93/30,387.91
  6. Step 6: Final answer
    x = 23,398.97

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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.