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Finding the Fourth Proportional to 5,163.68, 7,128.72 and 3,068.32

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Solution

The fourth proportional to 5,163.68, 7,128.72 and 3,068.32 is: 4,235.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,163.68 : 7,128.72 = 3,068.32 : x
  2. Step 2: Convert to fraction form
    5,163.68/7,128.72 = 3,068.32/x
  3. Step 3: Cross multiply
    5,163.68x = 7,128.72 × 3,068.32
  4. Step 4: Simplify right side
    5,163.68x = 21,873,194.15
  5. Step 5: Solve for x
    x = 21,873,194.15/5,163.68
  6. Step 6: Final answer
    x = 4,235.97

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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.