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Finding the Third Proportional to 5,642.16 and 12,155.70

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Solution

The third proportional to 5,642.16 and 12,155.70 is: 26,188.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,642.16 : 12,155.70 = 12,155.70 : x
  2. Step 2: Convert to fraction form
    5,642.16/12,155.70 = 12,155.70/x
  3. Step 3: Cross multiply
    5,642.16x = 12,155.70 × 12,155.70
  4. Step 4: Simplify right side
    5,642.16x = 147,760,928.53
  5. Step 5: Solve for x
    x = 147,760,928.53/5,642.16
  6. Step 6: Final answer
    x = 26,188.73

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.