Home / 12,781.29-19,177.61-4,987.47

Finding the Fourth Proportional to 12,781.29, 19,177.61 and 4,987.47

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Solution

The fourth proportional to 12,781.29, 19,177.61 and 4,987.47 is: 7,483.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,781.29 : 19,177.61 = 4,987.47 : x
  2. Step 2: Convert to fraction form
    12,781.29/19,177.61 = 4,987.47/x
  3. Step 3: Cross multiply
    12,781.29x = 19,177.61 × 4,987.47
  4. Step 4: Simplify right side
    12,781.29x = 95,647,729.61
  5. Step 5: Solve for x
    x = 95,647,729.61/12,781.29
  6. Step 6: Final answer
    x = 7,483.42

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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.