Home / 11,156.38-15,394.09-6,439.75

Finding the Fourth Proportional to 11,156.38, 15,394.09 and 6,439.75

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Solution

The fourth proportional to 11,156.38, 15,394.09 and 6,439.75 is: 8,885.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,156.38 : 15,394.09 = 6,439.75 : x
  2. Step 2: Convert to fraction form
    11,156.38/15,394.09 = 6,439.75/x
  3. Step 3: Cross multiply
    11,156.38x = 15,394.09 × 6,439.75
  4. Step 4: Simplify right side
    11,156.38x = 99,134,091.08
  5. Step 5: Solve for x
    x = 99,134,091.08/11,156.38
  6. Step 6: Final answer
    x = 8,885.87

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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.