Home / 8,781.49-13,172.24-2,938.15

Finding the Fourth Proportional to 8,781.49, 13,172.24 and 2,938.15

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Solution

The fourth proportional to 8,781.49, 13,172.24 and 2,938.15 is: 4,407.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.49 : 13,172.24 = 2,938.15 : x
  2. Step 2: Convert to fraction form
    8,781.49/13,172.24 = 2,938.15/x
  3. Step 3: Cross multiply
    8,781.49x = 13,172.24 × 2,938.15
  4. Step 4: Simplify right side
    8,781.49x = 38,702,016.96
  5. Step 5: Solve for x
    x = 38,702,016.96/8,781.49
  6. Step 6: Final answer
    x = 4,407.23

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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.