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Finding the Fourth Proportional to 26,431.31, 39,646.97 and 7,963.31

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Solution

The fourth proportional to 26,431.31, 39,646.97 and 7,963.31 is: 11,944.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,431.31 : 39,646.97 = 7,963.31 : x
  2. Step 2: Convert to fraction form
    26,431.31/39,646.97 = 7,963.31/x
  3. Step 3: Cross multiply
    26,431.31x = 39,646.97 × 7,963.31
  4. Step 4: Simplify right side
    26,431.31x = 315,721,201.83
  5. Step 5: Solve for x
    x = 315,721,201.83/26,431.31
  6. Step 6: Final answer
    x = 11,944.97

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1.5x scale

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.