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Finding the Fourth Proportional to 26.19, 39.05 and 25.61

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Solution

The fourth proportional to 26.19, 39.05 and 25.61 is: 38.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.19 : 39.05 = 25.61 : x
  2. Step 2: Convert to fraction form
    26.19/39.05 = 25.61/x
  3. Step 3: Cross multiply
    26.19x = 39.05 × 25.61
  4. Step 4: Simplify right side
    26.19x = 999.99
  5. Step 5: Solve for x
    x = 999.99/26.19
  6. Step 6: Final answer
    x = 38.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.