Home / 12,388.20-18,580.68-6,145.80

Finding the Fourth Proportional to 12,388.20, 18,580.68 and 6,145.80

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Solution

The fourth proportional to 12,388.20, 18,580.68 and 6,145.80 is: 9,217.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,388.20 : 18,580.68 = 6,145.80 : x
  2. Step 2: Convert to fraction form
    12,388.20/18,580.68 = 6,145.80/x
  3. Step 3: Cross multiply
    12,388.20x = 18,580.68 × 6,145.80
  4. Step 4: Simplify right side
    12,388.20x = 114,193,143.14
  5. Step 5: Solve for x
    x = 114,193,143.14/12,388.20
  6. Step 6: Final answer
    x = 9,217.90

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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.