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Finding the Fourth Proportional to 18,526.88, 27,781.92 and 7,991.92

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Solution

The fourth proportional to 18,526.88, 27,781.92 and 7,991.92 is: 11,984.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,526.88 : 27,781.92 = 7,991.92 : x
  2. Step 2: Convert to fraction form
    18,526.88/27,781.92 = 7,991.92/x
  3. Step 3: Cross multiply
    18,526.88x = 27,781.92 × 7,991.92
  4. Step 4: Simplify right side
    18,526.88x = 222,030,882.09
  5. Step 5: Solve for x
    x = 222,030,882.09/18,526.88
  6. Step 6: Final answer
    x = 11,984.26

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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.