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Finding the Fourth Proportional to 26.25, 36.20 and 21.07

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Solution

The fourth proportional to 26.25, 36.20 and 21.07 is: 29.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.25 : 36.20 = 21.07 : x
  2. Step 2: Convert to fraction form
    26.25/36.20 = 21.07/x
  3. Step 3: Cross multiply
    26.25x = 36.20 × 21.07
  4. Step 4: Simplify right side
    26.25x = 762.63
  5. Step 5: Solve for x
    x = 762.63/26.25
  6. Step 6: Final answer
    x = 29.05

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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.