Home / 6,639.45-9,160.79-4,278.75

Finding the Fourth Proportional to 6,639.45, 9,160.79 and 4,278.75

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Solution

The fourth proportional to 6,639.45, 9,160.79 and 4,278.75 is: 5,903.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.45 : 9,160.79 = 4,278.75 : x
  2. Step 2: Convert to fraction form
    6,639.45/9,160.79 = 4,278.75/x
  3. Step 3: Cross multiply
    6,639.45x = 9,160.79 × 4,278.75
  4. Step 4: Simplify right side
    6,639.45x = 39,196,708.82
  5. Step 5: Solve for x
    x = 39,196,708.82/6,639.45
  6. Step 6: Final answer
    x = 5,903.61

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Half scale
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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.