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Finding the Fourth Proportional to 26, 39.16 and 21.04

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Solution

The fourth proportional to 26, 39.16 and 21.04 is: 31.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    26 : 39.16 = 21.04 : x
  2. Step 2: Convert to fraction form
    26/39.16 = 21.04/x
  3. Step 3: Cross multiply
    26x = 39.16 × 21.04
  4. Step 4: Simplify right side
    26x = 823.93
  5. Step 5: Solve for x
    x = 823.93/26
  6. Step 6: Final answer
    x = 31.69

Related Problems

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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.