Home / 31,686.06-43,687.07-20,335.53

Finding the Fourth Proportional to 31,686.06, 43,687.07 and 20,335.53

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Solution

The fourth proportional to 31,686.06, 43,687.07 and 20,335.53 is: 28,037.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,686.06 : 43,687.07 = 20,335.53 : x
  2. Step 2: Convert to fraction form
    31,686.06/43,687.07 = 20,335.53/x
  3. Step 3: Cross multiply
    31,686.06x = 43,687.07 × 20,335.53
  4. Step 4: Simplify right side
    31,686.06x = 888,399,620.92
  5. Step 5: Solve for x
    x = 888,399,620.92/31,686.06
  6. Step 6: Final answer
    x = 28,037.55

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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.