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Finding the Fourth Proportional to 39,791.76, 54,920.44 and 22,807.40

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Solution

The fourth proportional to 39,791.76, 54,920.44 and 22,807.40 is: 31,478.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,791.76 : 54,920.44 = 22,807.40 : x
  2. Step 2: Convert to fraction form
    39,791.76/54,920.44 = 22,807.40/x
  3. Step 3: Cross multiply
    39,791.76x = 54,920.44 × 22,807.40
  4. Step 4: Simplify right side
    39,791.76x = 1,252,592,111.64
  5. Step 5: Solve for x
    x = 1,252,592,111.64/39,791.76
  6. Step 6: Final answer
    x = 31,478.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.