Home / 11,121.66-16,687.14-4,878.45

Finding the Fourth Proportional to 11,121.66, 16,687.14 and 4,878.45

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Solution

The fourth proportional to 11,121.66, 16,687.14 and 4,878.45 is: 7,319.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.66 : 16,687.14 = 4,878.45 : x
  2. Step 2: Convert to fraction form
    11,121.66/16,687.14 = 4,878.45/x
  3. Step 3: Cross multiply
    11,121.66x = 16,687.14 × 4,878.45
  4. Step 4: Simplify right side
    11,121.66x = 81,407,378.13
  5. Step 5: Solve for x
    x = 81,407,378.13/11,121.66
  6. Step 6: Final answer
    x = 7,319.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.