Home / 12,143.22-18,207.15-5,121.30

Finding the Fourth Proportional to 12,143.22, 18,207.15 and 5,121.30

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Solution

The fourth proportional to 12,143.22, 18,207.15 and 5,121.30 is: 7,678.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.22 : 18,207.15 = 5,121.30 : x
  2. Step 2: Convert to fraction form
    12,143.22/18,207.15 = 5,121.30/x
  3. Step 3: Cross multiply
    12,143.22x = 18,207.15 × 5,121.30
  4. Step 4: Simplify right side
    12,143.22x = 93,244,277.30
  5. Step 5: Solve for x
    x = 93,244,277.30/12,143.22
  6. Step 6: Final answer
    x = 7,678.71

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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.