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Finding the Third Proportional to 5,042 and 7,988

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Solution

The third proportional to 5,042 and 7,988 is: 12,655.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,042 : 7,988 = 7,988 : x
  2. Step 2: Convert to fraction form
    5,042/7,988 = 7,988/x
  3. Step 3: Cross multiply
    5,042x = 7,988 × 7,988
  4. Step 4: Simplify right side
    5,042x = 63,808,144
  5. Step 5: Solve for x
    x = 63,808,144/5,042
  6. Step 6: Final answer
    x = 12,655.32

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.