Home / 12,200.60-18,288.30-6,642.20

Finding the Fourth Proportional to 12,200.60, 18,288.30 and 6,642.20

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Solution

The fourth proportional to 12,200.60, 18,288.30 and 6,642.20 is: 9,956.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,200.60 : 18,288.30 = 6,642.20 : x
  2. Step 2: Convert to fraction form
    12,200.60/18,288.30 = 6,642.20/x
  3. Step 3: Cross multiply
    12,200.60x = 18,288.30 × 6,642.20
  4. Step 4: Simplify right side
    12,200.60x = 121,474,546.26
  5. Step 5: Solve for x
    x = 121,474,546.26/12,200.60
  6. Step 6: Final answer
    x = 9,956.44

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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.