Home / 15,186.55-20,957.38-8,471.78

Finding the Fourth Proportional to 15,186.55, 20,957.38 and 8,471.78

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Solution

The fourth proportional to 15,186.55, 20,957.38 and 8,471.78 is: 11,691.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,186.55 : 20,957.38 = 8,471.78 : x
  2. Step 2: Convert to fraction form
    15,186.55/20,957.38 = 8,471.78/x
  3. Step 3: Cross multiply
    15,186.55x = 20,957.38 × 8,471.78
  4. Step 4: Simplify right side
    15,186.55x = 177,546,283.54
  5. Step 5: Solve for x
    x = 177,546,283.54/15,186.55
  6. Step 6: Final answer
    x = 11,691.02

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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.