Home / 20,755.38-28,642.43-12,371.88

Finding the Fourth Proportional to 20,755.38, 28,642.43 and 12,371.88

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Solution

The fourth proportional to 20,755.38, 28,642.43 and 12,371.88 is: 17,073.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.38 : 28,642.43 = 12,371.88 : x
  2. Step 2: Convert to fraction form
    20,755.38/28,642.43 = 12,371.88/x
  3. Step 3: Cross multiply
    20,755.38x = 28,642.43 × 12,371.88
  4. Step 4: Simplify right side
    20,755.38x = 354,360,706.87
  5. Step 5: Solve for x
    x = 354,360,706.87/20,755.38
  6. Step 6: Final answer
    x = 17,073.20

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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.