Home / 21,685.38-29,925.42-12,125.40

Finding the Fourth Proportional to 21,685.38, 29,925.42 and 12,125.40

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Solution

The fourth proportional to 21,685.38, 29,925.42 and 12,125.40 is: 16,732.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,685.38 : 29,925.42 = 12,125.40 : x
  2. Step 2: Convert to fraction form
    21,685.38/29,925.42 = 12,125.40/x
  3. Step 3: Cross multiply
    21,685.38x = 29,925.42 × 12,125.40
  4. Step 4: Simplify right side
    21,685.38x = 362,857,687.67
  5. Step 5: Solve for x
    x = 362,857,687.67/21,685.38
  6. Step 6: Final answer
    x = 16,732.83

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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.