Home / 31,129.85-42,959.11-16,982.59

Finding the Fourth Proportional to 31,129.85, 42,959.11 and 16,982.59

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Solution

The fourth proportional to 31,129.85, 42,959.11 and 16,982.59 is: 23,435.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,129.85 : 42,959.11 = 16,982.59 : x
  2. Step 2: Convert to fraction form
    31,129.85/42,959.11 = 16,982.59/x
  3. Step 3: Cross multiply
    31,129.85x = 42,959.11 × 16,982.59
  4. Step 4: Simplify right side
    31,129.85x = 729,556,951.89
  5. Step 5: Solve for x
    x = 729,556,951.89/31,129.85
  6. Step 6: Final answer
    x = 23,435.93

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1.5x scale

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.