Home / 5,640.28-7,782.90-3,122.20

Finding the Fourth Proportional to 5,640.28, 7,782.90 and 3,122.20

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Solution

The fourth proportional to 5,640.28, 7,782.90 and 3,122.20 is: 4,308.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.28 : 7,782.90 = 3,122.20 : x
  2. Step 2: Convert to fraction form
    5,640.28/7,782.90 = 3,122.20/x
  3. Step 3: Cross multiply
    5,640.28x = 7,782.90 × 3,122.20
  4. Step 4: Simplify right side
    5,640.28x = 24,299,770.38
  5. Step 5: Solve for x
    x = 24,299,770.38/5,640.28
  6. Step 6: Final answer
    x = 4,308.26

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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.