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Finding the Fourth Proportional to 26.06, 38.90 and 20.93

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Solution

The fourth proportional to 26.06, 38.90 and 20.93 is: 31.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.06 : 38.90 = 20.93 : x
  2. Step 2: Convert to fraction form
    26.06/38.90 = 20.93/x
  3. Step 3: Cross multiply
    26.06x = 38.90 × 20.93
  4. Step 4: Simplify right side
    26.06x = 814.03
  5. Step 5: Solve for x
    x = 814.03/26.06
  6. Step 6: Final answer
    x = 31.24

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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.