Home / 15,139.25-20,892.17-8,515.25

Finding the Fourth Proportional to 15,139.25, 20,892.17 and 8,515.25

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Solution

The fourth proportional to 15,139.25, 20,892.17 and 8,515.25 is: 11,751.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139.25 : 20,892.17 = 8,515.25 : x
  2. Step 2: Convert to fraction form
    15,139.25/20,892.17 = 8,515.25/x
  3. Step 3: Cross multiply
    15,139.25x = 20,892.17 × 8,515.25
  4. Step 4: Simplify right side
    15,139.25x = 177,902,008.02
  5. Step 5: Solve for x
    x = 177,902,008.02/15,139.25
  6. Step 6: Final answer
    x = 11,751.05

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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.