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Finding the Fourth Proportional to 8,641.79, 11,926.56 and 5,286.83

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Solution

The fourth proportional to 8,641.79, 11,926.56 and 5,286.83 is: 7,296.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,641.79 : 11,926.56 = 5,286.83 : x
  2. Step 2: Convert to fraction form
    8,641.79/11,926.56 = 5,286.83/x
  3. Step 3: Cross multiply
    8,641.79x = 11,926.56 × 5,286.83
  4. Step 4: Simplify right side
    8,641.79x = 63,053,667.08
  5. Step 5: Solve for x
    x = 63,053,667.08/8,641.79
  6. Step 6: Final answer
    x = 7,296.37

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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.