Home / 31,129.40-42,960.60-17,701.90

Finding the Fourth Proportional to 31,129.40, 42,960.60 and 17,701.90

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Solution

The fourth proportional to 31,129.40, 42,960.60 and 17,701.90 is: 24,429.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,129.40 : 42,960.60 = 17,701.90 : x
  2. Step 2: Convert to fraction form
    31,129.40/42,960.60 = 17,701.90/x
  3. Step 3: Cross multiply
    31,129.40x = 42,960.60 × 17,701.90
  4. Step 4: Simplify right side
    31,129.40x = 760,484,245.14
  5. Step 5: Solve for x
    x = 760,484,245.14/31,129.40
  6. Step 6: Final answer
    x = 24,429.78

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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.