Home / 8,128.61-11,217.69-4,940.81

Finding the Fourth Proportional to 8,128.61, 11,217.69 and 4,940.81

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Solution

The fourth proportional to 8,128.61, 11,217.69 and 4,940.81 is: 6,818.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.61 : 11,217.69 = 4,940.81 : x
  2. Step 2: Convert to fraction form
    8,128.61/11,217.69 = 4,940.81/x
  3. Step 3: Cross multiply
    8,128.61x = 11,217.69 × 4,940.81
  4. Step 4: Simplify right side
    8,128.61x = 55,424,474.93
  5. Step 5: Solve for x
    x = 55,424,474.93/8,128.61
  6. Step 6: Final answer
    x = 6,818.44

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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.