Home / 21,711.46-29,960.40-12,149.74

Finding the Fourth Proportional to 21,711.46, 29,960.40 and 12,149.74

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Solution

The fourth proportional to 21,711.46, 29,960.40 and 12,149.74 is: 16,765.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,711.46 : 29,960.40 = 12,149.74 : x
  2. Step 2: Convert to fraction form
    21,711.46/29,960.40 = 12,149.74/x
  3. Step 3: Cross multiply
    21,711.46x = 29,960.40 × 12,149.74
  4. Step 4: Simplify right side
    21,711.46x = 364,011,070.30
  5. Step 5: Solve for x
    x = 364,011,070.30/21,711.46
  6. Step 6: Final answer
    x = 16,765.85

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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.