Home / 12,982.28-19,465.11-7,715.88

Finding the Fourth Proportional to 12,982.28, 19,465.11 and 7,715.88

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Solution

The fourth proportional to 12,982.28, 19,465.11 and 7,715.88 is: 11,568.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,982.28 : 19,465.11 = 7,715.88 : x
  2. Step 2: Convert to fraction form
    12,982.28/19,465.11 = 7,715.88/x
  3. Step 3: Cross multiply
    12,982.28x = 19,465.11 × 7,715.88
  4. Step 4: Simplify right side
    12,982.28x = 150,190,452.95
  5. Step 5: Solve for x
    x = 150,190,452.95/12,982.28
  6. Step 6: Final answer
    x = 11,568.89

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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.