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Finding the Fourth Proportional to 18,672.71, 27,979.89 and 15,887.93

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Solution

The fourth proportional to 18,672.71, 27,979.89 and 15,887.93 is: 23,807.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.71 : 27,979.89 = 15,887.93 : x
  2. Step 2: Convert to fraction form
    18,672.71/27,979.89 = 15,887.93/x
  3. Step 3: Cross multiply
    18,672.71x = 27,979.89 × 15,887.93
  4. Step 4: Simplify right side
    18,672.71x = 444,542,393.83
  5. Step 5: Solve for x
    x = 444,542,393.83/18,672.71
  6. Step 6: Final answer
    x = 23,807.07

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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.