Home / 19,079.97-28,612.76-7,987.43

Finding the Fourth Proportional to 19,079.97, 28,612.76 and 7,987.43

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Solution

The fourth proportional to 19,079.97, 28,612.76 and 7,987.43 is: 11,978.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,079.97 : 28,612.76 = 7,987.43 : x
  2. Step 2: Convert to fraction form
    19,079.97/28,612.76 = 7,987.43/x
  3. Step 3: Cross multiply
    19,079.97x = 28,612.76 × 7,987.43
  4. Step 4: Simplify right side
    19,079.97x = 228,542,294.51
  5. Step 5: Solve for x
    x = 228,542,294.51/19,079.97
  6. Step 6: Final answer
    x = 11,978.13

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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.