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Finding the Fourth Proportional to 6,287.91, 8,678.39 and 3,636.93

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Solution

The fourth proportional to 6,287.91, 8,678.39 and 3,636.93 is: 5,019.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,287.91 : 8,678.39 = 3,636.93 : x
  2. Step 2: Convert to fraction form
    6,287.91/8,678.39 = 3,636.93/x
  3. Step 3: Cross multiply
    6,287.91x = 8,678.39 × 3,636.93
  4. Step 4: Simplify right side
    6,287.91x = 31,562,696.94
  5. Step 5: Solve for x
    x = 31,562,696.94/6,287.91
  6. Step 6: Final answer
    x = 5,019.58

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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.