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Finding the Fourth Proportional to 8,310.17, 11,479.22 and 7,719.68

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Solution

The fourth proportional to 8,310.17, 11,479.22 and 7,719.68 is: 10,663.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,310.17 : 11,479.22 = 7,719.68 : x
  2. Step 2: Convert to fraction form
    8,310.17/11,479.22 = 7,719.68/x
  3. Step 3: Cross multiply
    8,310.17x = 11,479.22 × 7,719.68
  4. Step 4: Simplify right side
    8,310.17x = 88,615,809.06
  5. Step 5: Solve for x
    x = 88,615,809.06/8,310.17
  6. Step 6: Final answer
    x = 10,663.54

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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.