Home / 2,921.80-4,382.70-2,630.20

Finding the Fourth Proportional to 2,921.80, 4,382.70 and 2,630.20

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Solution

The fourth proportional to 2,921.80, 4,382.70 and 2,630.20 is: 3,945.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.80 : 4,382.70 = 2,630.20 : x
  2. Step 2: Convert to fraction form
    2,921.80/4,382.70 = 2,630.20/x
  3. Step 3: Cross multiply
    2,921.80x = 4,382.70 × 2,630.20
  4. Step 4: Simplify right side
    2,921.80x = 11,527,377.54
  5. Step 5: Solve for x
    x = 11,527,377.54/2,921.80
  6. Step 6: Final answer
    x = 3,945.30

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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.