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Finding the Fourth Proportional to 8,667.86, 11,961.65 and 4,891.83

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Solution

The fourth proportional to 8,667.86, 11,961.65 and 4,891.83 is: 6,750.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,667.86 : 11,961.65 = 4,891.83 : x
  2. Step 2: Convert to fraction form
    8,667.86/11,961.65 = 4,891.83/x
  3. Step 3: Cross multiply
    8,667.86x = 11,961.65 × 4,891.83
  4. Step 4: Simplify right side
    8,667.86x = 58,514,274.05
  5. Step 5: Solve for x
    x = 58,514,274.05/8,667.86
  6. Step 6: Final answer
    x = 6,750.72

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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.