Home / 15,872.91-21,900.18-12,505.28

Finding the Fourth Proportional to 15,872.91, 21,900.18 and 12,505.28

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Solution

The fourth proportional to 15,872.91, 21,900.18 and 12,505.28 is: 17,253.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,872.91 : 21,900.18 = 12,505.28 : x
  2. Step 2: Convert to fraction form
    15,872.91/21,900.18 = 12,505.28/x
  3. Step 3: Cross multiply
    15,872.91x = 21,900.18 × 12,505.28
  4. Step 4: Simplify right side
    15,872.91x = 273,867,937.70
  5. Step 5: Solve for x
    x = 273,867,937.70/15,872.91
  6. Step 6: Final answer
    x = 17,253.80

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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.