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Finding the Fourth Proportional to 40,612.32, 60,918.48 and 21,907.80

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Solution

The fourth proportional to 40,612.32, 60,918.48 and 21,907.80 is: 32,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,612.32 : 60,918.48 = 21,907.80 : x
  2. Step 2: Convert to fraction form
    40,612.32/60,918.48 = 21,907.80/x
  3. Step 3: Cross multiply
    40,612.32x = 60,918.48 × 21,907.80
  4. Step 4: Simplify right side
    40,612.32x = 1,334,589,876.14
  5. Step 5: Solve for x
    x = 1,334,589,876.14/40,612.32
  6. Step 6: Final answer
    x = 32,861.70

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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.