Home / 40,905.62-61,403.98-21,178.88

Finding the Fourth Proportional to 40,905.62, 61,403.98 and 21,178.88

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Solution

The fourth proportional to 40,905.62, 61,403.98 and 21,178.88 is: 31,791.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,905.62 : 61,403.98 = 21,178.88 : x
  2. Step 2: Convert to fraction form
    40,905.62/61,403.98 = 21,178.88/x
  3. Step 3: Cross multiply
    40,905.62x = 61,403.98 × 21,178.88
  4. Step 4: Simplify right side
    40,905.62x = 1,300,467,216.92
  5. Step 5: Solve for x
    x = 1,300,467,216.92/40,905.62
  6. Step 6: Final answer
    x = 31,791.90

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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.