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Finding the Fourth Proportional to 47,080.56, 70,620.84 and 15,915

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Solution

The fourth proportional to 47,080.56, 70,620.84 and 15,915 is: 23,872.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,080.56 : 70,620.84 = 15,915 : x
  2. Step 2: Convert to fraction form
    47,080.56/70,620.84 = 15,915/x
  3. Step 3: Cross multiply
    47,080.56x = 70,620.84 × 15,915
  4. Step 4: Simplify right side
    47,080.56x = 1,123,930,668.60
  5. Step 5: Solve for x
    x = 1,123,930,668.60/47,080.56
  6. Step 6: Final answer
    x = 23,872.50

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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.