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Finding the Fourth Proportional to 8,108.70, 11,190.00 and 4,382.70

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Solution

The fourth proportional to 8,108.70, 11,190.00 and 4,382.70 is: 6,048.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,108.70 : 11,190.00 = 4,382.70 : x
  2. Step 2: Convert to fraction form
    8,108.70/11,190.00 = 4,382.70/x
  3. Step 3: Cross multiply
    8,108.70x = 11,190.00 × 4,382.70
  4. Step 4: Simplify right side
    8,108.70x = 49,042,431.71
  5. Step 5: Solve for x
    x = 49,042,431.71/8,108.70
  6. Step 6: Final answer
    x = 6,048.12

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.