Home / 8,781.90-13,172.40-6,321.12

Finding the Fourth Proportional to 8,781.90, 13,172.40 and 6,321.12

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Solution

The fourth proportional to 8,781.90, 13,172.40 and 6,321.12 is: 9,481.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.90 : 13,172.40 = 6,321.12 : x
  2. Step 2: Convert to fraction form
    8,781.90/13,172.40 = 6,321.12/x
  3. Step 3: Cross multiply
    8,781.90x = 13,172.40 × 6,321.12
  4. Step 4: Simplify right side
    8,781.90x = 83,264,321.09
  5. Step 5: Solve for x
    x = 83,264,321.09/8,781.90
  6. Step 6: Final answer
    x = 9,481.36

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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.