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Finding the Fourth Proportional to 18,759.87, 25,877.34 and 12,386.52

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Solution

The fourth proportional to 18,759.87, 25,877.34 and 12,386.52 is: 17,085.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,759.87 : 25,877.34 = 12,386.52 : x
  2. Step 2: Convert to fraction form
    18,759.87/25,877.34 = 12,386.52/x
  3. Step 3: Cross multiply
    18,759.87x = 25,877.34 × 12,386.52
  4. Step 4: Simplify right side
    18,759.87x = 320,530,189.46
  5. Step 5: Solve for x
    x = 320,530,189.46/18,759.87
  6. Step 6: Final answer
    x = 17,085.95

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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.