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Finding the Fourth Proportional to 18,753.12, 28,135.62 and 11,737.62

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Solution

The fourth proportional to 18,753.12, 28,135.62 and 11,737.62 is: 17,610.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.12 : 28,135.62 = 11,737.62 : x
  2. Step 2: Convert to fraction form
    18,753.12/28,135.62 = 11,737.62/x
  3. Step 3: Cross multiply
    18,753.12x = 28,135.62 × 11,737.62
  4. Step 4: Simplify right side
    18,753.12x = 330,245,216.02
  5. Step 5: Solve for x
    x = 330,245,216.02/18,753.12
  6. Step 6: Final answer
    x = 17,610.15

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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.