Home / 18,882.40-28,329.20-7,789.75

Finding the Fourth Proportional to 18,882.40, 28,329.20 and 7,789.75

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Solution

The fourth proportional to 18,882.40, 28,329.20 and 7,789.75 is: 11,686.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,882.40 : 28,329.20 = 7,789.75 : x
  2. Step 2: Convert to fraction form
    18,882.40/28,329.20 = 7,789.75/x
  3. Step 3: Cross multiply
    18,882.40x = 28,329.20 × 7,789.75
  4. Step 4: Simplify right side
    18,882.40x = 220,677,385.70
  5. Step 5: Solve for x
    x = 220,677,385.70/18,882.40
  6. Step 6: Final answer
    x = 11,686.94

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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.