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Finding the Fourth Proportional to 26.13, 39.47 and 25.91

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Solution

The fourth proportional to 26.13, 39.47 and 25.91 is: 39.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.13 : 39.47 = 25.91 : x
  2. Step 2: Convert to fraction form
    26.13/39.47 = 25.91/x
  3. Step 3: Cross multiply
    26.13x = 39.47 × 25.91
  4. Step 4: Simplify right side
    26.13x = 1,022.54
  5. Step 5: Solve for x
    x = 1,022.54/26.13
  6. Step 6: Final answer
    x = 39.13

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.