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Finding the Fourth Proportional to 18,753.67, 28,115.90 and 9,388.86

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Solution

The fourth proportional to 18,753.67, 28,115.90 and 9,388.86 is: 14,075.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.67 : 28,115.90 = 9,388.86 : x
  2. Step 2: Convert to fraction form
    18,753.67/28,115.90 = 9,388.86/x
  3. Step 3: Cross multiply
    18,753.67x = 28,115.90 × 9,388.86
  4. Step 4: Simplify right side
    18,753.67x = 263,976,237.14
  5. Step 5: Solve for x
    x = 263,976,237.14/18,753.67
  6. Step 6: Final answer
    x = 14,075.98

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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.