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Finding the Fourth Proportional to 18,191.77, 27,287.56 and 15,719.02

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Solution

The fourth proportional to 18,191.77, 27,287.56 and 15,719.02 is: 23,578.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,191.77 : 27,287.56 = 15,719.02 : x
  2. Step 2: Convert to fraction form
    18,191.77/27,287.56 = 15,719.02/x
  3. Step 3: Cross multiply
    18,191.77x = 27,287.56 × 15,719.02
  4. Step 4: Simplify right side
    18,191.77x = 428,933,701.39
  5. Step 5: Solve for x
    x = 428,933,701.39/18,191.77
  6. Step 6: Final answer
    x = 23,578.45

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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.