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Finding the Fourth Proportional to 18,680.20, 25,753.88 and 15,481.50

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Solution

The fourth proportional to 18,680.20, 25,753.88 and 15,481.50 is: 21,343.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,680.20 : 25,753.88 = 15,481.50 : x
  2. Step 2: Convert to fraction form
    18,680.20/25,753.88 = 15,481.50/x
  3. Step 3: Cross multiply
    18,680.20x = 25,753.88 × 15,481.50
  4. Step 4: Simplify right side
    18,680.20x = 398,708,693.22
  5. Step 5: Solve for x
    x = 398,708,693.22/18,680.20
  6. Step 6: Final answer
    x = 21,343.92

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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.