Home / 11,418.66-15,759.72-6,639.15

Finding the Fourth Proportional to 11,418.66, 15,759.72 and 6,639.15

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Solution

The fourth proportional to 11,418.66, 15,759.72 and 6,639.15 is: 9,163.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,418.66 : 15,759.72 = 6,639.15 : x
  2. Step 2: Convert to fraction form
    11,418.66/15,759.72 = 6,639.15/x
  3. Step 3: Cross multiply
    11,418.66x = 15,759.72 × 6,639.15
  4. Step 4: Simplify right side
    11,418.66x = 104,631,145.04
  5. Step 5: Solve for x
    x = 104,631,145.04/11,418.66
  6. Step 6: Final answer
    x = 9,163.17

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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.