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Finding the Third Proportional to 4,140 and 8,900

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Solution

The third proportional to 4,140 and 8,900 is: 19,132.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,140 : 8,900 = 8,900 : x
  2. Step 2: Convert to fraction form
    4,140/8,900 = 8,900/x
  3. Step 3: Cross multiply
    4,140x = 8,900 × 8,900
  4. Step 4: Simplify right side
    4,140x = 79,210,000
  5. Step 5: Solve for x
    x = 79,210,000/4,140
  6. Step 6: Final answer
    x = 19,132.85

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.