Home / 28,209.18-42,314.37-9,489.78

Finding the Fourth Proportional to 28,209.18, 42,314.37 and 9,489.78

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Solution

The fourth proportional to 28,209.18, 42,314.37 and 9,489.78 is: 14,234.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,209.18 : 42,314.37 = 9,489.78 : x
  2. Step 2: Convert to fraction form
    28,209.18/42,314.37 = 9,489.78/x
  3. Step 3: Cross multiply
    28,209.18x = 42,314.37 × 9,489.78
  4. Step 4: Simplify right side
    28,209.18x = 401,554,062.14
  5. Step 5: Solve for x
    x = 401,554,062.14/28,209.18
  6. Step 6: Final answer
    x = 14,234.87

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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.