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Finding the Third Proportional to 6,139.13 and 6,913.69

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Solution

The third proportional to 6,139.13 and 6,913.69 is: 7,785.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,139.13 : 6,913.69 = 6,913.69 : x
  2. Step 2: Convert to fraction form
    6,139.13/6,913.69 = 6,913.69/x
  3. Step 3: Cross multiply
    6,139.13x = 6,913.69 × 6,913.69
  4. Step 4: Simplify right side
    6,139.13x = 47,799,074.85
  5. Step 5: Solve for x
    x = 47,799,074.85/6,139.13
  6. Step 6: Final answer
    x = 7,785.98

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.