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Finding the Fourth Proportional to 18,188.52, 27,282.69 and 15,715.77

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Solution

The fourth proportional to 18,188.52, 27,282.69 and 15,715.77 is: 23,573.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,188.52 : 27,282.69 = 15,715.77 : x
  2. Step 2: Convert to fraction form
    18,188.52/27,282.69 = 15,715.77/x
  3. Step 3: Cross multiply
    18,188.52x = 27,282.69 × 15,715.77
  4. Step 4: Simplify right side
    18,188.52x = 428,768,481.02
  5. Step 5: Solve for x
    x = 428,768,481.02/18,188.52
  6. Step 6: Final answer
    x = 23,573.58

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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.