Home / 20,724.80-31,067.68-10,326.72

Finding the Fourth Proportional to 20,724.80, 31,067.68 and 10,326.72

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Solution

The fourth proportional to 20,724.80, 31,067.68 and 10,326.72 is: 15,480.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.80 : 31,067.68 = 10,326.72 : x
  2. Step 2: Convert to fraction form
    20,724.80/31,067.68 = 10,326.72/x
  3. Step 3: Cross multiply
    20,724.80x = 31,067.68 × 10,326.72
  4. Step 4: Simplify right side
    20,724.80x = 320,827,232.41
  5. Step 5: Solve for x
    x = 320,827,232.41/20,724.80
  6. Step 6: Final answer
    x = 15,480.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.