Home / 6,821.20-9,414.16-5,057.80

Finding the Fourth Proportional to 6,821.20, 9,414.16 and 5,057.80

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Solution

The fourth proportional to 6,821.20, 9,414.16 and 5,057.80 is: 6,980.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,821.20 : 9,414.16 = 5,057.80 : x
  2. Step 2: Convert to fraction form
    6,821.20/9,414.16 = 5,057.80/x
  3. Step 3: Cross multiply
    6,821.20x = 9,414.16 × 5,057.80
  4. Step 4: Simplify right side
    6,821.20x = 47,614,938.45
  5. Step 5: Solve for x
    x = 47,614,938.45/6,821.20
  6. Step 6: Final answer
    x = 6,980.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.