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Finding the Fourth Proportional to 21.08, 29.08 and 14.60

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Solution

The fourth proportional to 21.08, 29.08 and 14.60 is: 20.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.08 : 29.08 = 14.60 : x
  2. Step 2: Convert to fraction form
    21.08/29.08 = 14.60/x
  3. Step 3: Cross multiply
    21.08x = 29.08 × 14.60
  4. Step 4: Simplify right side
    21.08x = 424.57
  5. Step 5: Solve for x
    x = 424.57/21.08
  6. Step 6: Final answer
    x = 20.14

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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.