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Finding the Third Proportional to 18,988 and 28,376

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Solution

The third proportional to 18,988 and 28,376 is: 42,405.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,988 : 28,376 = 28,376 : x
  2. Step 2: Convert to fraction form
    18,988/28,376 = 28,376/x
  3. Step 3: Cross multiply
    18,988x = 28,376 × 28,376
  4. Step 4: Simplify right side
    18,988x = 805,197,376
  5. Step 5: Solve for x
    x = 805,197,376/18,988
  6. Step 6: Final answer
    x = 42,405.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.