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Finding the Fourth Proportional to 40,710.60, 61,074.62 and 12,630.05

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Solution

The fourth proportional to 40,710.60, 61,074.62 and 12,630.05 is: 18,947.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,710.60 : 61,074.62 = 12,630.05 : x
  2. Step 2: Convert to fraction form
    40,710.60/61,074.62 = 12,630.05/x
  3. Step 3: Cross multiply
    40,710.60x = 61,074.62 × 12,630.05
  4. Step 4: Simplify right side
    40,710.60x = 771,375,504.33
  5. Step 5: Solve for x
    x = 771,375,504.33/40,710.60
  6. Step 6: Final answer
    x = 18,947.78

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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.