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Finding the Third Proportional to 4,272.50 and 9,386.50

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Solution

The third proportional to 4,272.50 and 9,386.50 is: 20,621.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,272.50 : 9,386.50 = 9,386.50 : x
  2. Step 2: Convert to fraction form
    4,272.50/9,386.50 = 9,386.50/x
  3. Step 3: Cross multiply
    4,272.50x = 9,386.50 × 9,386.50
  4. Step 4: Simplify right side
    4,272.50x = 88,106,382.25
  5. Step 5: Solve for x
    x = 88,106,382.25/4,272.50
  6. Step 6: Final answer
    x = 20,621.74

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.