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Finding the Fourth Proportional to 18,689.52, 25,791.03 and 10,191.87

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Solution

The fourth proportional to 18,689.52, 25,791.03 and 10,191.87 is: 14,064.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689.52 : 25,791.03 = 10,191.87 : x
  2. Step 2: Convert to fraction form
    18,689.52/25,791.03 = 10,191.87/x
  3. Step 3: Cross multiply
    18,689.52x = 25,791.03 × 10,191.87
  4. Step 4: Simplify right side
    18,689.52x = 262,858,824.93
  5. Step 5: Solve for x
    x = 262,858,824.93/18,689.52
  6. Step 6: Final answer
    x = 14,064.50

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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.