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Finding the Third Proportional to 5,212.75 and 7,681.19

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Solution

The third proportional to 5,212.75 and 7,681.19 is: 11,318.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,212.75 : 7,681.19 = 7,681.19 : x
  2. Step 2: Convert to fraction form
    5,212.75/7,681.19 = 7,681.19/x
  3. Step 3: Cross multiply
    5,212.75x = 7,681.19 × 7,681.19
  4. Step 4: Simplify right side
    5,212.75x = 59,000,641.41
  5. Step 5: Solve for x
    x = 59,000,641.41/5,212.75
  6. Step 6: Final answer
    x = 11,318.53

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.