Home / 7,987.57-11,981.45-3,057.71

Finding the Fourth Proportional to 7,987.57, 11,981.45 and 3,057.71

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Solution

The fourth proportional to 7,987.57, 11,981.45 and 3,057.71 is: 4,586.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987.57 : 11,981.45 = 3,057.71 : x
  2. Step 2: Convert to fraction form
    7,987.57/11,981.45 = 3,057.71/x
  3. Step 3: Cross multiply
    7,987.57x = 11,981.45 × 3,057.71
  4. Step 4: Simplify right side
    7,987.57x = 36,635,747.22
  5. Step 5: Solve for x
    x = 36,635,747.22/7,987.57
  6. Step 6: Final answer
    x = 4,586.60

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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.