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Finding the Fourth Proportional to 8,628.81, 11,910.69 and 5,979.71

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Solution

The fourth proportional to 8,628.81, 11,910.69 and 5,979.71 is: 8,254.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628.81 : 11,910.69 = 5,979.71 : x
  2. Step 2: Convert to fraction form
    8,628.81/11,910.69 = 5,979.71/x
  3. Step 3: Cross multiply
    8,628.81x = 11,910.69 × 5,979.71
  4. Step 4: Simplify right side
    8,628.81x = 71,222,412.55
  5. Step 5: Solve for x
    x = 71,222,412.55/8,628.81
  6. Step 6: Final answer
    x = 8,254.02

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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.