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Finding the Fourth Proportional to 18,514.77, 27,753.92 and 7,987.20

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Solution

The fourth proportional to 18,514.77, 27,753.92 and 7,987.20 is: 11,972.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,514.77 : 27,753.92 = 7,987.20 : x
  2. Step 2: Convert to fraction form
    18,514.77/27,753.92 = 7,987.20/x
  3. Step 3: Cross multiply
    18,514.77x = 27,753.92 × 7,987.20
  4. Step 4: Simplify right side
    18,514.77x = 221,676,109.82
  5. Step 5: Solve for x
    x = 221,676,109.82/18,514.77
  6. Step 6: Final answer
    x = 11,972.93

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1.5x scale

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.