Home / 40,905.11-61,403.23-21,178.37

Finding the Fourth Proportional to 40,905.11, 61,403.23 and 21,178.37

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Solution

The fourth proportional to 40,905.11, 61,403.23 and 21,178.37 is: 31,791.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,905.11 : 61,403.23 = 21,178.37 : x
  2. Step 2: Convert to fraction form
    40,905.11/61,403.23 = 21,178.37/x
  3. Step 3: Cross multiply
    40,905.11x = 61,403.23 × 21,178.37
  4. Step 4: Simplify right side
    40,905.11x = 1,300,420,504.12
  5. Step 5: Solve for x
    x = 1,300,420,504.12/40,905.11
  6. Step 6: Final answer
    x = 31,791.15

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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.