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Finding the Fourth Proportional to 8,716.68, 11,998.80 and 7,581.60

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Solution

The fourth proportional to 8,716.68, 11,998.80 and 7,581.60 is: 10,436.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,716.68 : 11,998.80 = 7,581.60 : x
  2. Step 2: Convert to fraction form
    8,716.68/11,998.80 = 7,581.60/x
  3. Step 3: Cross multiply
    8,716.68x = 11,998.80 × 7,581.60
  4. Step 4: Simplify right side
    8,716.68x = 90,970,102.08
  5. Step 5: Solve for x
    x = 90,970,102.08/8,716.68
  6. Step 6: Final answer
    x = 10,436.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.