Home / 12,478.05-17,222.60-8,229.87

Finding the Fourth Proportional to 12,478.05, 17,222.60 and 8,229.87

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Solution

The fourth proportional to 12,478.05, 17,222.60 and 8,229.87 is: 11,359.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.05 : 17,222.60 = 8,229.87 : x
  2. Step 2: Convert to fraction form
    12,478.05/17,222.60 = 8,229.87/x
  3. Step 3: Cross multiply
    12,478.05x = 17,222.60 × 8,229.87
  4. Step 4: Simplify right side
    12,478.05x = 141,739,759.06
  5. Step 5: Solve for x
    x = 141,739,759.06/12,478.05
  6. Step 6: Final answer
    x = 11,359.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.