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Finding the Fourth Proportional to 12.58, 17.39 and 10.56

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Solution

The fourth proportional to 12.58, 17.39 and 10.56 is: 14.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.58 : 17.39 = 10.56 : x
  2. Step 2: Convert to fraction form
    12.58/17.39 = 10.56/x
  3. Step 3: Cross multiply
    12.58x = 17.39 × 10.56
  4. Step 4: Simplify right side
    12.58x = 183.55
  5. Step 5: Solve for x
    x = 183.55/12.58
  6. Step 6: Final answer
    x = 14.59

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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.