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Finding the Third Proportional to 7,281 and 11,668.50

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Solution

The third proportional to 7,281 and 11,668.50 is: 18,699.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,281 : 11,668.50 = 11,668.50 : x
  2. Step 2: Convert to fraction form
    7,281/11,668.50 = 11,668.50/x
  3. Step 3: Cross multiply
    7,281x = 11,668.50 × 11,668.50
  4. Step 4: Simplify right side
    7,281x = 136,153,892.25
  5. Step 5: Solve for x
    x = 136,153,892.25/7,281
  6. Step 6: Final answer
    x = 18,699.89

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.