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Finding the Fourth Proportional to 21,044.92, 31,394.89 and 20,472.88

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Solution

The fourth proportional to 21,044.92, 31,394.89 and 20,472.88 is: 30,541.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,044.92 : 31,394.89 = 20,472.88 : x
  2. Step 2: Convert to fraction form
    21,044.92/31,394.89 = 20,472.88/x
  3. Step 3: Cross multiply
    21,044.92x = 31,394.89 × 20,472.88
  4. Step 4: Simplify right side
    21,044.92x = 642,743,815.58
  5. Step 5: Solve for x
    x = 642,743,815.58/21,044.92
  6. Step 6: Final answer
    x = 30,541.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.