Home / 11,139.38-15,372.34-6,171.38

Finding the Fourth Proportional to 11,139.38, 15,372.34 and 6,171.38

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Solution

The fourth proportional to 11,139.38, 15,372.34 and 6,171.38 is: 8,516.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.38 : 15,372.34 = 6,171.38 : x
  2. Step 2: Convert to fraction form
    11,139.38/15,372.34 = 6,171.38/x
  3. Step 3: Cross multiply
    11,139.38x = 15,372.34 × 6,171.38
  4. Step 4: Simplify right side
    11,139.38x = 94,868,551.63
  5. Step 5: Solve for x
    x = 94,868,551.63/11,139.38
  6. Step 6: Final answer
    x = 8,516.50

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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.