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Finding the Third Proportional to 6,615 and 8,779.50

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Solution

The third proportional to 6,615 and 8,779.50 is: 11,652.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,615 : 8,779.50 = 8,779.50 : x
  2. Step 2: Convert to fraction form
    6,615/8,779.50 = 8,779.50/x
  3. Step 3: Cross multiply
    6,615x = 8,779.50 × 8,779.50
  4. Step 4: Simplify right side
    6,615x = 77,079,620.25
  5. Step 5: Solve for x
    x = 77,079,620.25/6,615
  6. Step 6: Final answer
    x = 11,652.25

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.