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Finding the Fourth Proportional to 14.93, 20.58 and 12.91

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Solution

The fourth proportional to 14.93, 20.58 and 12.91 is: 17.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.93 : 20.58 = 12.91 : x
  2. Step 2: Convert to fraction form
    14.93/20.58 = 12.91/x
  3. Step 3: Cross multiply
    14.93x = 20.58 × 12.91
  4. Step 4: Simplify right side
    14.93x = 265.69
  5. Step 5: Solve for x
    x = 265.69/14.93
  6. Step 6: Final answer
    x = 17.80

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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.