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Finding the Fourth Proportional to 40,642.38, 60,981.03 and 21,900.60

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Solution

The fourth proportional to 40,642.38, 60,981.03 and 21,900.60 is: 32,860.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,642.38 : 60,981.03 = 21,900.60 : x
  2. Step 2: Convert to fraction form
    40,642.38/60,981.03 = 21,900.60/x
  3. Step 3: Cross multiply
    40,642.38x = 60,981.03 × 21,900.60
  4. Step 4: Simplify right side
    40,642.38x = 1,335,521,145.62
  5. Step 5: Solve for x
    x = 1,335,521,145.62/40,642.38
  6. Step 6: Final answer
    x = 32,860.31

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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.