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Finding the Fourth Proportional to 21,565.52, 29,758.01 and 12,133.88

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Solution

The fourth proportional to 21,565.52, 29,758.01 and 12,133.88 is: 16,743.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,565.52 : 29,758.01 = 12,133.88 : x
  2. Step 2: Convert to fraction form
    21,565.52/29,758.01 = 12,133.88/x
  3. Step 3: Cross multiply
    21,565.52x = 29,758.01 × 12,133.88
  4. Step 4: Simplify right side
    21,565.52x = 361,080,122.38
  5. Step 5: Solve for x
    x = 361,080,122.38/21,565.52
  6. Step 6: Final answer
    x = 16,743.40

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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.