Home / 12,221.20-18,319.65-5,635.90

Finding the Fourth Proportional to 12,221.20, 18,319.65 and 5,635.90

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Solution

The fourth proportional to 12,221.20, 18,319.65 and 5,635.90 is: 8,448.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.20 : 18,319.65 = 5,635.90 : x
  2. Step 2: Convert to fraction form
    12,221.20/18,319.65 = 5,635.90/x
  3. Step 3: Cross multiply
    12,221.20x = 18,319.65 × 5,635.90
  4. Step 4: Simplify right side
    12,221.20x = 103,247,715.44
  5. Step 5: Solve for x
    x = 103,247,715.44/12,221.20
  6. Step 6: Final answer
    x = 8,448.25

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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.