Home / 12,619.92-18,932.16-8,486.40

Finding the Fourth Proportional to 12,619.92, 18,932.16 and 8,486.40

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Solution

The fourth proportional to 12,619.92, 18,932.16 and 8,486.40 is: 12,731.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,619.92 : 18,932.16 = 8,486.40 : x
  2. Step 2: Convert to fraction form
    12,619.92/18,932.16 = 8,486.40/x
  3. Step 3: Cross multiply
    12,619.92x = 18,932.16 × 8,486.40
  4. Step 4: Simplify right side
    12,619.92x = 160,665,882.62
  5. Step 5: Solve for x
    x = 160,665,882.62/12,619.92
  6. Step 6: Final answer
    x = 12,731.13

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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.