Home / 13,909.38-20,863.80-3,521.22

Finding the Fourth Proportional to 13,909.38, 20,863.80 and 3,521.22

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Solution

The fourth proportional to 13,909.38, 20,863.80 and 3,521.22 is: 5,281.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.38 : 20,863.80 = 3,521.22 : x
  2. Step 2: Convert to fraction form
    13,909.38/20,863.80 = 3,521.22/x
  3. Step 3: Cross multiply
    13,909.38x = 20,863.80 × 3,521.22
  4. Step 4: Simplify right side
    13,909.38x = 73,466,029.84
  5. Step 5: Solve for x
    x = 73,466,029.84/13,909.38
  6. Step 6: Final answer
    x = 5,281.76

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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.