Home / 21,249.16-31,869.42-20,195.35

Finding the Fourth Proportional to 21,249.16, 31,869.42 and 20,195.35

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Solution

The fourth proportional to 21,249.16, 31,869.42 and 20,195.35 is: 30,288.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,249.16 : 31,869.42 = 20,195.35 : x
  2. Step 2: Convert to fraction form
    21,249.16/31,869.42 = 20,195.35/x
  3. Step 3: Cross multiply
    21,249.16x = 31,869.42 × 20,195.35
  4. Step 4: Simplify right side
    21,249.16x = 643,614,091.20
  5. Step 5: Solve for x
    x = 643,614,091.20/21,249.16
  6. Step 6: Final answer
    x = 30,288.92

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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.