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Finding the Fourth Proportional to 6,287.70, 9,433.32 and 5,128.68

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Solution

The fourth proportional to 6,287.70, 9,433.32 and 5,128.68 is: 7,694.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,287.70 : 9,433.32 = 5,128.68 : x
  2. Step 2: Convert to fraction form
    6,287.70/9,433.32 = 5,128.68/x
  3. Step 3: Cross multiply
    6,287.70x = 9,433.32 × 5,128.68
  4. Step 4: Simplify right side
    6,287.70x = 48,380,479.62
  5. Step 5: Solve for x
    x = 48,380,479.62/6,287.70
  6. Step 6: Final answer
    x = 7,694.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.