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Finding the Fourth Proportional to 18,753.76, 28,129.68 and 5,606.24

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Solution

The fourth proportional to 18,753.76, 28,129.68 and 5,606.24 is: 8,409.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.76 : 28,129.68 = 5,606.24 : x
  2. Step 2: Convert to fraction form
    18,753.76/28,129.68 = 5,606.24/x
  3. Step 3: Cross multiply
    18,753.76x = 28,129.68 × 5,606.24
  4. Step 4: Simplify right side
    18,753.76x = 157,701,737.20
  5. Step 5: Solve for x
    x = 157,701,737.20/18,753.76
  6. Step 6: Final answer
    x = 8,409.07

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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.