Home / 7,781.28-11,672.59-3,339.15

Finding the Fourth Proportional to 7,781.28, 11,672.59 and 3,339.15

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Solution

The fourth proportional to 7,781.28, 11,672.59 and 3,339.15 is: 5,009.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781.28 : 11,672.59 = 3,339.15 : x
  2. Step 2: Convert to fraction form
    7,781.28/11,672.59 = 3,339.15/x
  3. Step 3: Cross multiply
    7,781.28x = 11,672.59 × 3,339.15
  4. Step 4: Simplify right side
    7,781.28x = 38,976,528.90
  5. Step 5: Solve for x
    x = 38,976,528.90/7,781.28
  6. Step 6: Final answer
    x = 5,009.01

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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.