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Finding the Fourth Proportional to 34,720.91, 47,915.11 and 18,805.49

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Solution

The fourth proportional to 34,720.91, 47,915.11 and 18,805.49 is: 25,951.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,720.91 : 47,915.11 = 18,805.49 : x
  2. Step 2: Convert to fraction form
    34,720.91/47,915.11 = 18,805.49/x
  3. Step 3: Cross multiply
    34,720.91x = 47,915.11 × 18,805.49
  4. Step 4: Simplify right side
    34,720.91x = 901,067,121.95
  5. Step 5: Solve for x
    x = 901,067,121.95/34,720.91
  6. Step 6: Final answer
    x = 25,951.71

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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.