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Finding the Third Proportional to 11,515.50 and 14,985

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Solution

The third proportional to 11,515.50 and 14,985 is: 19,499.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,515.50 : 14,985 = 14,985 : x
  2. Step 2: Convert to fraction form
    11,515.50/14,985 = 14,985/x
  3. Step 3: Cross multiply
    11,515.50x = 14,985 × 14,985
  4. Step 4: Simplify right side
    11,515.50x = 224,550,225
  5. Step 5: Solve for x
    x = 224,550,225/11,515.50
  6. Step 6: Final answer
    x = 19,499.82

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.