Home / 31.25-47.11-29.60

Finding the Fourth Proportional to 31.25, 47.11 and 29.60

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Solution

The fourth proportional to 31.25, 47.11 and 29.60 is: 44.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.25 : 47.11 = 29.60 : x
  2. Step 2: Convert to fraction form
    31.25/47.11 = 29.60/x
  3. Step 3: Cross multiply
    31.25x = 47.11 × 29.60
  4. Step 4: Simplify right side
    31.25x = 1,394.26
  5. Step 5: Solve for x
    x = 1,394.26/31.25
  6. Step 6: Final answer
    x = 44.62

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.