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Finding the Third Proportional to 7,164 and 8,689.50

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Solution

The third proportional to 7,164 and 8,689.50 is: 10,539.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,164 : 8,689.50 = 8,689.50 : x
  2. Step 2: Convert to fraction form
    7,164/8,689.50 = 8,689.50/x
  3. Step 3: Cross multiply
    7,164x = 8,689.50 × 8,689.50
  4. Step 4: Simplify right side
    7,164x = 75,507,410.25
  5. Step 5: Solve for x
    x = 75,507,410.25/7,164
  6. Step 6: Final answer
    x = 10,539.84

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.