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Finding the Third Proportional to 5,117.63 and 7,881.75

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Solution

The third proportional to 5,117.63 and 7,881.75 is: 12,138.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,117.63 : 7,881.75 = 7,881.75 : x
  2. Step 2: Convert to fraction form
    5,117.63/7,881.75 = 7,881.75/x
  3. Step 3: Cross multiply
    5,117.63x = 7,881.75 × 7,881.75
  4. Step 4: Simplify right side
    5,117.63x = 62,121,983.06
  5. Step 5: Solve for x
    x = 62,121,983.06/5,117.63
  6. Step 6: Final answer
    x = 12,138.83

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.