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Finding the Third Proportional to 1,987.50 and 4,935

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Solution

The third proportional to 1,987.50 and 4,935 is: 12,253.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.50 : 4,935 = 4,935 : x
  2. Step 2: Convert to fraction form
    1,987.50/4,935 = 4,935/x
  3. Step 3: Cross multiply
    1,987.50x = 4,935 × 4,935
  4. Step 4: Simplify right side
    1,987.50x = 24,354,225
  5. Step 5: Solve for x
    x = 24,354,225/1,987.50
  6. Step 6: Final answer
    x = 12,253.70

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Why These Related Problems?

These problems maintain the same ratio (2.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.