Home / 8,480.12-12,719.36-5,191.52

Finding the Fourth Proportional to 8,480.12, 12,719.36 and 5,191.52

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Solution

The fourth proportional to 8,480.12, 12,719.36 and 5,191.52 is: 7,786.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,480.12 : 12,719.36 = 5,191.52 : x
  2. Step 2: Convert to fraction form
    8,480.12/12,719.36 = 5,191.52/x
  3. Step 3: Cross multiply
    8,480.12x = 12,719.36 × 5,191.52
  4. Step 4: Simplify right side
    8,480.12x = 66,032,761.21
  5. Step 5: Solve for x
    x = 66,032,761.21/8,480.12
  6. Step 6: Final answer
    x = 7,786.78

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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.