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Finding the Third Proportional to 6,987 and 11,122.50

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Solution

The third proportional to 6,987 and 11,122.50 is: 17,705.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987 : 11,122.50 = 11,122.50 : x
  2. Step 2: Convert to fraction form
    6,987/11,122.50 = 11,122.50/x
  3. Step 3: Cross multiply
    6,987x = 11,122.50 × 11,122.50
  4. Step 4: Simplify right side
    6,987x = 123,710,006.25
  5. Step 5: Solve for x
    x = 123,710,006.25/6,987
  6. Step 6: Final answer
    x = 17,705.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.