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Finding the Fourth Proportional to 8,666.88, 11,961.32 and 5,682.84

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Solution

The fourth proportional to 8,666.88, 11,961.32 and 5,682.84 is: 7,842.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.88 : 11,961.32 = 5,682.84 : x
  2. Step 2: Convert to fraction form
    8,666.88/11,961.32 = 5,682.84/x
  3. Step 3: Cross multiply
    8,666.88x = 11,961.32 × 5,682.84
  4. Step 4: Simplify right side
    8,666.88x = 67,974,239.33
  5. Step 5: Solve for x
    x = 67,974,239.33/8,666.88
  6. Step 6: Final answer
    x = 7,842.99

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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.