Home / 12,480.20-18,720.30-3,246.20

Finding the Fourth Proportional to 12,480.20, 18,720.30 and 3,246.20

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Solution

The fourth proportional to 12,480.20, 18,720.30 and 3,246.20 is: 4,869.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.20 : 18,720.30 = 3,246.20 : x
  2. Step 2: Convert to fraction form
    12,480.20/18,720.30 = 3,246.20/x
  3. Step 3: Cross multiply
    12,480.20x = 18,720.30 × 3,246.20
  4. Step 4: Simplify right side
    12,480.20x = 60,769,837.86
  5. Step 5: Solve for x
    x = 60,769,837.86/12,480.20
  6. Step 6: Final answer
    x = 4,869.30

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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.