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Finding the Third Proportional to 7,490 and 9,871

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Solution

The third proportional to 7,490 and 9,871 is: 13,008.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,490 : 9,871 = 9,871 : x
  2. Step 2: Convert to fraction form
    7,490/9,871 = 9,871/x
  3. Step 3: Cross multiply
    7,490x = 9,871 × 9,871
  4. Step 4: Simplify right side
    7,490x = 97,436,641
  5. Step 5: Solve for x
    x = 97,436,641/7,490
  6. Step 6: Final answer
    x = 13,008.90

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.