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Finding the Fourth Proportional to 18,367.88, 25,347.67 and 10,915.88

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Solution

The fourth proportional to 18,367.88, 25,347.67 and 10,915.88 is: 15,063.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,367.88 : 25,347.67 = 10,915.88 : x
  2. Step 2: Convert to fraction form
    18,367.88/25,347.67 = 10,915.88/x
  3. Step 3: Cross multiply
    18,367.88x = 25,347.67 × 10,915.88
  4. Step 4: Simplify right side
    18,367.88x = 276,691,969.97
  5. Step 5: Solve for x
    x = 276,691,969.97/18,367.88
  6. Step 6: Final answer
    x = 15,063.91

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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.