Home / 8,139.90-12,200.40-3,757.80

Finding the Fourth Proportional to 8,139.90, 12,200.40 and 3,757.80

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Solution

The fourth proportional to 8,139.90, 12,200.40 and 3,757.80 is: 5,632.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.90 : 12,200.40 = 3,757.80 : x
  2. Step 2: Convert to fraction form
    8,139.90/12,200.40 = 3,757.80/x
  3. Step 3: Cross multiply
    8,139.90x = 12,200.40 × 3,757.80
  4. Step 4: Simplify right side
    8,139.90x = 45,846,663.12
  5. Step 5: Solve for x
    x = 45,846,663.12/8,139.90
  6. Step 6: Final answer
    x = 5,632.34

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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.