Home / 31,551.88-43,542.13-20,393.32

Finding the Fourth Proportional to 31,551.88, 43,542.13 and 20,393.32

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Solution

The fourth proportional to 31,551.88, 43,542.13 and 20,393.32 is: 28,143.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,551.88 : 43,542.13 = 20,393.32 : x
  2. Step 2: Convert to fraction form
    31,551.88/43,542.13 = 20,393.32/x
  3. Step 3: Cross multiply
    31,551.88x = 43,542.13 × 20,393.32
  4. Step 4: Simplify right side
    31,551.88x = 887,968,590.57
  5. Step 5: Solve for x
    x = 887,968,590.57/31,551.88
  6. Step 6: Final answer
    x = 28,143.13

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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.