Home / 31,002.98-42,790.92-20,393.60

Finding the Fourth Proportional to 31,002.98, 42,790.92 and 20,393.60

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Solution

The fourth proportional to 31,002.98, 42,790.92 and 20,393.60 is: 28,147.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,002.98 : 42,790.92 = 20,393.60 : x
  2. Step 2: Convert to fraction form
    31,002.98/42,790.92 = 20,393.60/x
  3. Step 3: Cross multiply
    31,002.98x = 42,790.92 × 20,393.60
  4. Step 4: Simplify right side
    31,002.98x = 872,660,906.11
  5. Step 5: Solve for x
    x = 872,660,906.11/31,002.98
  6. Step 6: Final answer
    x = 28,147.65

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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.