Home / 12,143.06-18,211.56-8,622.80

Finding the Fourth Proportional to 12,143.06, 18,211.56 and 8,622.80

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Solution

The fourth proportional to 12,143.06, 18,211.56 and 8,622.80 is: 12,932.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.06 : 18,211.56 = 8,622.80 : x
  2. Step 2: Convert to fraction form
    12,143.06/18,211.56 = 8,622.80/x
  3. Step 3: Cross multiply
    12,143.06x = 18,211.56 × 8,622.80
  4. Step 4: Simplify right side
    12,143.06x = 157,034,639.57
  5. Step 5: Solve for x
    x = 157,034,639.57/12,143.06
  6. Step 6: Final answer
    x = 12,932.05

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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.