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Finding the Fourth Proportional to 18,680.76, 25,780.99 and 10,724.52

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Solution

The fourth proportional to 18,680.76, 25,780.99 and 10,724.52 is: 14,800.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,680.76 : 25,780.99 = 10,724.52 : x
  2. Step 2: Convert to fraction form
    18,680.76/25,780.99 = 10,724.52/x
  3. Step 3: Cross multiply
    18,680.76x = 25,780.99 × 10,724.52
  4. Step 4: Simplify right side
    18,680.76x = 276,488,742.87
  5. Step 5: Solve for x
    x = 276,488,742.87/18,680.76
  6. Step 6: Final answer
    x = 14,800.72

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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.