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Finding the Third Proportional to 7,428 and 9,778.50

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Solution

The third proportional to 7,428 and 9,778.50 is: 12,872.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,428 : 9,778.50 = 9,778.50 : x
  2. Step 2: Convert to fraction form
    7,428/9,778.50 = 9,778.50/x
  3. Step 3: Cross multiply
    7,428x = 9,778.50 × 9,778.50
  4. Step 4: Simplify right side
    7,428x = 95,619,062.25
  5. Step 5: Solve for x
    x = 95,619,062.25/7,428
  6. Step 6: Final answer
    x = 12,872.79

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.