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Finding the Fourth Proportional to 18,651.15, 25,737.84 and 10,687.86

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Solution

The fourth proportional to 18,651.15, 25,737.84 and 10,687.86 is: 14,748.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,651.15 : 25,737.84 = 10,687.86 : x
  2. Step 2: Convert to fraction form
    18,651.15/25,737.84 = 10,687.86/x
  3. Step 3: Cross multiply
    18,651.15x = 25,737.84 × 10,687.86
  4. Step 4: Simplify right side
    18,651.15x = 275,082,430.62
  5. Step 5: Solve for x
    x = 275,082,430.62/18,651.15
  6. Step 6: Final answer
    x = 14,748.82

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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.