Home / 3,981.20-5,971.80-1,517.16

Finding the Fourth Proportional to 3,981.20, 5,971.80 and 1,517.16

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Solution

The fourth proportional to 3,981.20, 5,971.80 and 1,517.16 is: 2,275.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.20 : 5,971.80 = 1,517.16 : x
  2. Step 2: Convert to fraction form
    3,981.20/5,971.80 = 1,517.16/x
  3. Step 3: Cross multiply
    3,981.20x = 5,971.80 × 1,517.16
  4. Step 4: Simplify right side
    3,981.20x = 9,060,176.09
  5. Step 5: Solve for x
    x = 9,060,176.09/3,981.20
  6. Step 6: Final answer
    x = 2,275.74

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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.