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Finding the Fourth Proportional to 18,737.76, 28,111.32 and 5,589.12

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Solution

The fourth proportional to 18,737.76, 28,111.32 and 5,589.12 is: 8,385.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,737.76 : 28,111.32 = 5,589.12 : x
  2. Step 2: Convert to fraction form
    18,737.76/28,111.32 = 5,589.12/x
  3. Step 3: Cross multiply
    18,737.76x = 28,111.32 × 5,589.12
  4. Step 4: Simplify right side
    18,737.76x = 157,117,540.84
  5. Step 5: Solve for x
    x = 157,117,540.84/18,737.76
  6. Step 6: Final answer
    x = 8,385.08

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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.