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Finding the Fourth Proportional to 18,687.30, 25,753.95 and 15,845.58

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Solution

The fourth proportional to 18,687.30, 25,753.95 and 15,845.58 is: 21,837.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.30 : 25,753.95 = 15,845.58 : x
  2. Step 2: Convert to fraction form
    18,687.30/25,753.95 = 15,845.58/x
  3. Step 3: Cross multiply
    18,687.30x = 25,753.95 × 15,845.58
  4. Step 4: Simplify right side
    18,687.30x = 408,086,275.04
  5. Step 5: Solve for x
    x = 408,086,275.04/18,687.30
  6. Step 6: Final answer
    x = 21,837.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.