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Finding the Third Proportional to 5,478 and 11,818.50

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Solution

The third proportional to 5,478 and 11,818.50 is: 25,497.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478 : 11,818.50 = 11,818.50 : x
  2. Step 2: Convert to fraction form
    5,478/11,818.50 = 11,818.50/x
  3. Step 3: Cross multiply
    5,478x = 11,818.50 × 11,818.50
  4. Step 4: Simplify right side
    5,478x = 139,676,942.25
  5. Step 5: Solve for x
    x = 139,676,942.25/5,478
  6. Step 6: Final answer
    x = 25,497.80

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.