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Finding the Fourth Proportional to 15,139.20, 22,708.80 and 14,167.20

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Solution

The fourth proportional to 15,139.20, 22,708.80 and 14,167.20 is: 21,250.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139.20 : 22,708.80 = 14,167.20 : x
  2. Step 2: Convert to fraction form
    15,139.20/22,708.80 = 14,167.20/x
  3. Step 3: Cross multiply
    15,139.20x = 22,708.80 × 14,167.20
  4. Step 4: Simplify right side
    15,139.20x = 321,720,111.36
  5. Step 5: Solve for x
    x = 321,720,111.36/15,139.20
  6. Step 6: Final answer
    x = 21,250.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.