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Finding the Fourth Proportional to 21,689.69, 29,932.00 and 12,737.30

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Solution

The fourth proportional to 21,689.69, 29,932.00 and 12,737.30 is: 17,577.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,689.69 : 29,932.00 = 12,737.30 : x
  2. Step 2: Convert to fraction form
    21,689.69/29,932.00 = 12,737.30/x
  3. Step 3: Cross multiply
    21,689.69x = 29,932.00 × 12,737.30
  4. Step 4: Simplify right side
    21,689.69x = 381,252,682.10
  5. Step 5: Solve for x
    x = 381,252,682.10/21,689.69
  6. Step 6: Final answer
    x = 17,577.60

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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.