Home / 4,781.20-7,172.11-1,271.15

Finding the Fourth Proportional to 4,781.20, 7,172.11 and 1,271.15

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Solution

The fourth proportional to 4,781.20, 7,172.11 and 1,271.15 is: 1,906.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,781.20 : 7,172.11 = 1,271.15 : x
  2. Step 2: Convert to fraction form
    4,781.20/7,172.11 = 1,271.15/x
  3. Step 3: Cross multiply
    4,781.20x = 7,172.11 × 1,271.15
  4. Step 4: Simplify right side
    4,781.20x = 9,116,821.27
  5. Step 5: Solve for x
    x = 9,116,821.27/4,781.20
  6. Step 6: Final answer
    x = 1,906.81

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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.