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Finding the Fourth Proportional to 18,191.52, 27,287.19 and 15,718.82

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Solution

The fourth proportional to 18,191.52, 27,287.19 and 15,718.82 is: 23,578.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,191.52 : 27,287.19 = 15,718.82 : x
  2. Step 2: Convert to fraction form
    18,191.52/27,287.19 = 15,718.82/x
  3. Step 3: Cross multiply
    18,191.52x = 27,287.19 × 15,718.82
  4. Step 4: Simplify right side
    18,191.52x = 428,922,291.48
  5. Step 5: Solve for x
    x = 428,922,291.48/18,191.52
  6. Step 6: Final answer
    x = 23,578.14

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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.