Home / 12,286.08-18,403.20-9,979.20

Finding the Fourth Proportional to 12,286.08, 18,403.20 and 9,979.20

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Solution

The fourth proportional to 12,286.08, 18,403.20 and 9,979.20 is: 14,947.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,286.08 : 18,403.20 = 9,979.20 : x
  2. Step 2: Convert to fraction form
    12,286.08/18,403.20 = 9,979.20/x
  3. Step 3: Cross multiply
    12,286.08x = 18,403.20 × 9,979.20
  4. Step 4: Simplify right side
    12,286.08x = 183,649,213.44
  5. Step 5: Solve for x
    x = 183,649,213.44/12,286.08
  6. Step 6: Final answer
    x = 14,947.75

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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.