Home / 31,482.80-43,399.20-20,853.92

Finding the Fourth Proportional to 31,482.80, 43,399.20 and 20,853.92

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Solution

The fourth proportional to 31,482.80, 43,399.20 and 20,853.92 is: 28,747.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,482.80 : 43,399.20 = 20,853.92 : x
  2. Step 2: Convert to fraction form
    31,482.80/43,399.20 = 20,853.92/x
  3. Step 3: Cross multiply
    31,482.80x = 43,399.20 × 20,853.92
  4. Step 4: Simplify right side
    31,482.80x = 905,043,444.86
  5. Step 5: Solve for x
    x = 905,043,444.86/31,482.80
  6. Step 6: Final answer
    x = 28,747.23

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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.