Home / 8,821.80-13,221.90-3,886.20

Finding the Fourth Proportional to 8,821.80, 13,221.90 and 3,886.20

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Solution

The fourth proportional to 8,821.80, 13,221.90 and 3,886.20 is: 5,824.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,821.80 : 13,221.90 = 3,886.20 : x
  2. Step 2: Convert to fraction form
    8,821.80/13,221.90 = 3,886.20/x
  3. Step 3: Cross multiply
    8,821.80x = 13,221.90 × 3,886.20
  4. Step 4: Simplify right side
    8,821.80x = 51,382,947.78
  5. Step 5: Solve for x
    x = 51,382,947.78/8,821.80
  6. Step 6: Final answer
    x = 5,824.54

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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.