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Finding the Fourth Proportional to 39,695, 54,781.80 and 22,928

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Solution

The fourth proportional to 39,695, 54,781.80 and 22,928 is: 31,642.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,695 : 54,781.80 = 22,928 : x
  2. Step 2: Convert to fraction form
    39,695/54,781.80 = 22,928/x
  3. Step 3: Cross multiply
    39,695x = 54,781.80 × 22,928
  4. Step 4: Simplify right side
    39,695x = 1,256,037,110.40
  5. Step 5: Solve for x
    x = 1,256,037,110.40/39,695
  6. Step 6: Final answer
    x = 31,642.20

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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.