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Finding the Fourth Proportional to 11,679.78, 16,118.04 and 6,711.78

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Solution

The fourth proportional to 11,679.78, 16,118.04 and 6,711.78 is: 9,262.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,679.78 : 16,118.04 = 6,711.78 : x
  2. Step 2: Convert to fraction form
    11,679.78/16,118.04 = 6,711.78/x
  3. Step 3: Cross multiply
    11,679.78x = 16,118.04 × 6,711.78
  4. Step 4: Simplify right side
    11,679.78x = 108,180,738.51
  5. Step 5: Solve for x
    x = 108,180,738.51/11,679.78
  6. Step 6: Final answer
    x = 9,262.22

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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.