Home / 7,862.60-11,778.07-3,639.90

Finding the Fourth Proportional to 7,862.60, 11,778.07 and 3,639.90

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Solution

The fourth proportional to 7,862.60, 11,778.07 and 3,639.90 is: 5,452.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,862.60 : 11,778.07 = 3,639.90 : x
  2. Step 2: Convert to fraction form
    7,862.60/11,778.07 = 3,639.90/x
  3. Step 3: Cross multiply
    7,862.60x = 11,778.07 × 3,639.90
  4. Step 4: Simplify right side
    7,862.60x = 42,870,996.99
  5. Step 5: Solve for x
    x = 42,870,996.99/7,862.60
  6. Step 6: Final answer
    x = 5,452.52

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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.