Home / 31,073.20-42,870.78-18,149.50

Finding the Fourth Proportional to 31,073.20, 42,870.78 and 18,149.50

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Solution

The fourth proportional to 31,073.20, 42,870.78 and 18,149.50 is: 25,040.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,073.20 : 42,870.78 = 18,149.50 : x
  2. Step 2: Convert to fraction form
    31,073.20/42,870.78 = 18,149.50/x
  3. Step 3: Cross multiply
    31,073.20x = 42,870.78 × 18,149.50
  4. Step 4: Simplify right side
    31,073.20x = 778,083,221.61
  5. Step 5: Solve for x
    x = 778,083,221.61/31,073.20
  6. Step 6: Final answer
    x = 25,040.33

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.