Home / 13,882.90-20,815.12-7,645.85

Finding the Fourth Proportional to 13,882.90, 20,815.12 and 7,645.85

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Solution

The fourth proportional to 13,882.90, 20,815.12 and 7,645.85 is: 11,463.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,882.90 : 20,815.12 = 7,645.85 : x
  2. Step 2: Convert to fraction form
    13,882.90/20,815.12 = 7,645.85/x
  3. Step 3: Cross multiply
    13,882.90x = 20,815.12 × 7,645.85
  4. Step 4: Simplify right side
    13,882.90x = 159,149,285.25
  5. Step 5: Solve for x
    x = 159,149,285.25/13,882.90
  6. Step 6: Final answer
    x = 11,463.69

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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.