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Finding the Third Proportional to 9,990 and 11,454

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Solution

The third proportional to 9,990 and 11,454 is: 13,132.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990 : 11,454 = 11,454 : x
  2. Step 2: Convert to fraction form
    9,990/11,454 = 11,454/x
  3. Step 3: Cross multiply
    9,990x = 11,454 × 11,454
  4. Step 4: Simplify right side
    9,990x = 131,194,116
  5. Step 5: Solve for x
    x = 131,194,116/9,990
  6. Step 6: Final answer
    x = 13,132.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.