Home / 12,209.40-18,259.20-8,919.18

Finding the Fourth Proportional to 12,209.40, 18,259.20 and 8,919.18

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Solution

The fourth proportional to 12,209.40, 18,259.20 and 8,919.18 is: 13,338.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,209.40 : 18,259.20 = 8,919.18 : x
  2. Step 2: Convert to fraction form
    12,209.40/18,259.20 = 8,919.18/x
  3. Step 3: Cross multiply
    12,209.40x = 18,259.20 × 8,919.18
  4. Step 4: Simplify right side
    12,209.40x = 162,857,091.46
  5. Step 5: Solve for x
    x = 162,857,091.46/12,209.40
  6. Step 6: Final answer
    x = 13,338.66

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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.