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Finding the Third Proportional to 5,147.50 and 6,990.25

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Solution

The third proportional to 5,147.50 and 6,990.25 is: 9,492.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,147.50 : 6,990.25 = 6,990.25 : x
  2. Step 2: Convert to fraction form
    5,147.50/6,990.25 = 6,990.25/x
  3. Step 3: Cross multiply
    5,147.50x = 6,990.25 × 6,990.25
  4. Step 4: Simplify right side
    5,147.50x = 48,863,595.06
  5. Step 5: Solve for x
    x = 48,863,595.06/5,147.50
  6. Step 6: Final answer
    x = 9,492.68

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.