Home / 21,512.28-29,687.13-12,081.72

Finding the Fourth Proportional to 21,512.28, 29,687.13 and 12,081.72

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Solution

The fourth proportional to 21,512.28, 29,687.13 and 12,081.72 is: 16,672.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,512.28 : 29,687.13 = 12,081.72 : x
  2. Step 2: Convert to fraction form
    21,512.28/29,687.13 = 12,081.72/x
  3. Step 3: Cross multiply
    21,512.28x = 29,687.13 × 12,081.72
  4. Step 4: Simplify right side
    21,512.28x = 358,671,592.26
  5. Step 5: Solve for x
    x = 358,671,592.26/21,512.28
  6. Step 6: Final answer
    x = 16,672.88

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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.