Home / 13,882.91-20,830.23-5,115.69

Finding the Fourth Proportional to 13,882.91, 20,830.23 and 5,115.69

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Solution

The fourth proportional to 13,882.91, 20,830.23 and 5,115.69 is: 7,675.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,882.91 : 20,830.23 = 5,115.69 : x
  2. Step 2: Convert to fraction form
    13,882.91/20,830.23 = 5,115.69/x
  3. Step 3: Cross multiply
    13,882.91x = 20,830.23 × 5,115.69
  4. Step 4: Simplify right side
    13,882.91x = 106,560,999.31
  5. Step 5: Solve for x
    x = 106,560,999.31/13,882.91
  6. Step 6: Final answer
    x = 7,675.70

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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.