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Finding the Fourth Proportional to 8,781.51, 13,160.76 and 7,668.12

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Solution

The fourth proportional to 8,781.51, 13,160.76 and 7,668.12 is: 11,492.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.51 : 13,160.76 = 7,668.12 : x
  2. Step 2: Convert to fraction form
    8,781.51/13,160.76 = 7,668.12/x
  3. Step 3: Cross multiply
    8,781.51x = 13,160.76 × 7,668.12
  4. Step 4: Simplify right side
    8,781.51x = 100,918,286.97
  5. Step 5: Solve for x
    x = 100,918,286.97/8,781.51
  6. Step 6: Final answer
    x = 11,492.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.