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Finding the Fourth Proportional to 20.29, 30.29 and 17.59

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Solution

The fourth proportional to 20.29, 30.29 and 17.59 is: 26.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.29 : 30.29 = 17.59 : x
  2. Step 2: Convert to fraction form
    20.29/30.29 = 17.59/x
  3. Step 3: Cross multiply
    20.29x = 30.29 × 17.59
  4. Step 4: Simplify right side
    20.29x = 532.80
  5. Step 5: Solve for x
    x = 532.80/20.29
  6. Step 6: Final answer
    x = 26.26

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1.5x scale

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.