Home / 8,781.45-13,172.28-2,937.90

Finding the Fourth Proportional to 8,781.45, 13,172.28 and 2,937.90

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Solution

The fourth proportional to 8,781.45, 13,172.28 and 2,937.90 is: 4,406.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.45 : 13,172.28 = 2,937.90 : x
  2. Step 2: Convert to fraction form
    8,781.45/13,172.28 = 2,937.90/x
  3. Step 3: Cross multiply
    8,781.45x = 13,172.28 × 2,937.90
  4. Step 4: Simplify right side
    8,781.45x = 38,698,841.41
  5. Step 5: Solve for x
    x = 38,698,841.41/8,781.45
  6. Step 6: Final answer
    x = 4,406.89

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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.