Home / 6,638.60-9,157.92-4,122.20

Finding the Fourth Proportional to 6,638.60, 9,157.92 and 4,122.20

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Solution

The fourth proportional to 6,638.60, 9,157.92 and 4,122.20 is: 5,686.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.60 : 9,157.92 = 4,122.20 : x
  2. Step 2: Convert to fraction form
    6,638.60/9,157.92 = 4,122.20/x
  3. Step 3: Cross multiply
    6,638.60x = 9,157.92 × 4,122.20
  4. Step 4: Simplify right side
    6,638.60x = 37,750,777.82
  5. Step 5: Solve for x
    x = 37,750,777.82/6,638.60
  6. Step 6: Final answer
    x = 5,686.56

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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.