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Finding the Fourth Proportional to 6,838.94, 9,476.72 and 6,422.78

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Solution

The fourth proportional to 6,838.94, 9,476.72 and 6,422.78 is: 8,900.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,838.94 : 9,476.72 = 6,422.78 : x
  2. Step 2: Convert to fraction form
    6,838.94/9,476.72 = 6,422.78/x
  3. Step 3: Cross multiply
    6,838.94x = 9,476.72 × 6,422.78
  4. Step 4: Simplify right side
    6,838.94x = 60,866,887.68
  5. Step 5: Solve for x
    x = 60,866,887.68/6,838.94
  6. Step 6: Final answer
    x = 8,900.05

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.