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Finding the Fourth Proportional to 18,753.92, 28,132.80 and 7,076.96

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Solution

The fourth proportional to 18,753.92, 28,132.80 and 7,076.96 is: 10,616.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.92 : 28,132.80 = 7,076.96 : x
  2. Step 2: Convert to fraction form
    18,753.92/28,132.80 = 7,076.96/x
  3. Step 3: Cross multiply
    18,753.92x = 28,132.80 × 7,076.96
  4. Step 4: Simplify right side
    18,753.92x = 199,094,700.29
  5. Step 5: Solve for x
    x = 199,094,700.29/18,753.92
  6. Step 6: Final answer
    x = 10,616.16

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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.