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Finding the Fourth Proportional to 26.71, 40.09 and 21.02

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Solution

The fourth proportional to 26.71, 40.09 and 21.02 is: 31.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.71 : 40.09 = 21.02 : x
  2. Step 2: Convert to fraction form
    26.71/40.09 = 21.02/x
  3. Step 3: Cross multiply
    26.71x = 40.09 × 21.02
  4. Step 4: Simplify right side
    26.71x = 842.69
  5. Step 5: Solve for x
    x = 842.69/26.71
  6. Step 6: Final answer
    x = 31.55

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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.