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Finding the Fourth Proportional to 11.45, 15.77 and 10.58

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Solution

The fourth proportional to 11.45, 15.77 and 10.58 is: 14.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.45 : 15.77 = 10.58 : x
  2. Step 2: Convert to fraction form
    11.45/15.77 = 10.58/x
  3. Step 3: Cross multiply
    11.45x = 15.77 × 10.58
  4. Step 4: Simplify right side
    11.45x = 166.71
  5. Step 5: Solve for x
    x = 166.71/11.45
  6. Step 6: Final answer
    x = 14.57

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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.