Home / 11,618.40-17,427.60-8,119.20

Finding the Fourth Proportional to 11,618.40, 17,427.60 and 8,119.20

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Solution

The fourth proportional to 11,618.40, 17,427.60 and 8,119.20 is: 12,178.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,618.40 : 17,427.60 = 8,119.20 : x
  2. Step 2: Convert to fraction form
    11,618.40/17,427.60 = 8,119.20/x
  3. Step 3: Cross multiply
    11,618.40x = 17,427.60 × 8,119.20
  4. Step 4: Simplify right side
    11,618.40x = 141,498,169.92
  5. Step 5: Solve for x
    x = 141,498,169.92/11,618.40
  6. Step 6: Final answer
    x = 12,178.80

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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.