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Finding the Third Proportional to 15,988 and 18,040

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Solution

The third proportional to 15,988 and 18,040 is: 20,355.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,988 : 18,040 = 18,040 : x
  2. Step 2: Convert to fraction form
    15,988/18,040 = 18,040/x
  3. Step 3: Cross multiply
    15,988x = 18,040 × 18,040
  4. Step 4: Simplify right side
    15,988x = 325,441,600
  5. Step 5: Solve for x
    x = 325,441,600/15,988
  6. Step 6: Final answer
    x = 20,355.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.