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Finding the Third Proportional to 21,360 and 29,988

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Solution

The third proportional to 21,360 and 29,988 is: 42,101.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,360 : 29,988 = 29,988 : x
  2. Step 2: Convert to fraction form
    21,360/29,988 = 29,988/x
  3. Step 3: Cross multiply
    21,360x = 29,988 × 29,988
  4. Step 4: Simplify right side
    21,360x = 899,280,144
  5. Step 5: Solve for x
    x = 899,280,144/21,360
  6. Step 6: Final answer
    x = 42,101.13

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.