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Finding the Fourth Proportional to 5,561.16, 7,629.16 and 5,415.90

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Solution

The fourth proportional to 5,561.16, 7,629.16 and 5,415.90 is: 7,429.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,561.16 : 7,629.16 = 5,415.90 : x
  2. Step 2: Convert to fraction form
    5,561.16/7,629.16 = 5,415.90/x
  3. Step 3: Cross multiply
    5,561.16x = 7,629.16 × 5,415.90
  4. Step 4: Simplify right side
    5,561.16x = 41,318,767.64
  5. Step 5: Solve for x
    x = 41,318,767.64/5,561.16
  6. Step 6: Final answer
    x = 7,429.88

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.