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Finding the Fourth Proportional to 5,151.60, 7,716.60 and 4,287.60

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Solution

The fourth proportional to 5,151.60, 7,716.60 and 4,287.60 is: 6,422.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151.60 : 7,716.60 = 4,287.60 : x
  2. Step 2: Convert to fraction form
    5,151.60/7,716.60 = 4,287.60/x
  3. Step 3: Cross multiply
    5,151.60x = 7,716.60 × 4,287.60
  4. Step 4: Simplify right side
    5,151.60x = 33,085,694.16
  5. Step 5: Solve for x
    x = 33,085,694.16/5,151.60
  6. Step 6: Final answer
    x = 6,422.41

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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.