Home / 7,781.30-11,672.05-2,587.17

Finding the Fourth Proportional to 7,781.30, 11,672.05 and 2,587.17

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Solution

The fourth proportional to 7,781.30, 11,672.05 and 2,587.17 is: 3,880.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781.30 : 11,672.05 = 2,587.17 : x
  2. Step 2: Convert to fraction form
    7,781.30/11,672.05 = 2,587.17/x
  3. Step 3: Cross multiply
    7,781.30x = 11,672.05 × 2,587.17
  4. Step 4: Simplify right side
    7,781.30x = 30,197,590.59
  5. Step 5: Solve for x
    x = 30,197,590.59/7,781.30
  6. Step 6: Final answer
    x = 3,880.79

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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.