Home / 21,704.40-29,951.36-12,143.68

Finding the Fourth Proportional to 21,704.40, 29,951.36 and 12,143.68

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Solution

The fourth proportional to 21,704.40, 29,951.36 and 12,143.68 is: 16,757.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,704.40 : 29,951.36 = 12,143.68 : x
  2. Step 2: Convert to fraction form
    21,704.40/29,951.36 = 12,143.68/x
  3. Step 3: Cross multiply
    21,704.40x = 29,951.36 × 12,143.68
  4. Step 4: Simplify right side
    21,704.40x = 363,719,731.40
  5. Step 5: Solve for x
    x = 363,719,731.40/21,704.40
  6. Step 6: Final answer
    x = 16,757.88

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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.