Home / 20,618.88-28,454.24-11,187.52

Finding the Fourth Proportional to 20,618.88, 28,454.24 and 11,187.52

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Solution

The fourth proportional to 20,618.88, 28,454.24 and 11,187.52 is: 15,438.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.88 : 28,454.24 = 11,187.52 : x
  2. Step 2: Convert to fraction form
    20,618.88/28,454.24 = 11,187.52/x
  3. Step 3: Cross multiply
    20,618.88x = 28,454.24 × 11,187.52
  4. Step 4: Simplify right side
    20,618.88x = 318,332,379.08
  5. Step 5: Solve for x
    x = 318,332,379.08/20,618.88
  6. Step 6: Final answer
    x = 15,438.88

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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.