Home / 11,217.38-15,479.06-6,438.78

Finding the Fourth Proportional to 11,217.38, 15,479.06 and 6,438.78

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Solution

The fourth proportional to 11,217.38, 15,479.06 and 6,438.78 is: 8,884.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,217.38 : 15,479.06 = 6,438.78 : x
  2. Step 2: Convert to fraction form
    11,217.38/15,479.06 = 6,438.78/x
  3. Step 3: Cross multiply
    11,217.38x = 15,479.06 × 6,438.78
  4. Step 4: Simplify right side
    11,217.38x = 99,666,229.75
  5. Step 5: Solve for x
    x = 99,666,229.75/11,217.38
  6. Step 6: Final answer
    x = 8,884.99

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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.