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Finding the Third Proportional to 5,181.19 and 8,128.69

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Solution

The third proportional to 5,181.19 and 8,128.69 is: 12,752.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,181.19 : 8,128.69 = 8,128.69 : x
  2. Step 2: Convert to fraction form
    5,181.19/8,128.69 = 8,128.69/x
  3. Step 3: Cross multiply
    5,181.19x = 8,128.69 × 8,128.69
  4. Step 4: Simplify right side
    5,181.19x = 66,075,560.47
  5. Step 5: Solve for x
    x = 66,075,560.47/5,181.19
  6. Step 6: Final answer
    x = 12,752.98

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.