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Finding the Fourth Proportional to 8,666.78, 11,964.74 and 6,672.96

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Solution

The fourth proportional to 8,666.78, 11,964.74 and 6,672.96 is: 9,212.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.78 : 11,964.74 = 6,672.96 : x
  2. Step 2: Convert to fraction form
    8,666.78/11,964.74 = 6,672.96/x
  3. Step 3: Cross multiply
    8,666.78x = 11,964.74 × 6,672.96
  4. Step 4: Simplify right side
    8,666.78x = 79,840,231.43
  5. Step 5: Solve for x
    x = 79,840,231.43/8,666.78
  6. Step 6: Final answer
    x = 9,212.21

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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.