Home / 12,143.08-18,220.38-7,222.42

Finding the Fourth Proportional to 12,143.08, 18,220.38 and 7,222.42

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Solution

The fourth proportional to 12,143.08, 18,220.38 and 7,222.42 is: 10,837.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.08 : 18,220.38 = 7,222.42 : x
  2. Step 2: Convert to fraction form
    12,143.08/18,220.38 = 7,222.42/x
  3. Step 3: Cross multiply
    12,143.08x = 18,220.38 × 7,222.42
  4. Step 4: Simplify right side
    12,143.08x = 131,595,236.92
  5. Step 5: Solve for x
    x = 131,595,236.92/12,143.08
  6. Step 6: Final answer
    x = 10,837.06

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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.