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Finding the Fourth Proportional to 6,128.11, 8,449.32 and 5,182.21

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Solution

The fourth proportional to 6,128.11, 8,449.32 and 5,182.21 is: 7,145.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,128.11 : 8,449.32 = 5,182.21 : x
  2. Step 2: Convert to fraction form
    6,128.11/8,449.32 = 5,182.21/x
  3. Step 3: Cross multiply
    6,128.11x = 8,449.32 × 5,182.21
  4. Step 4: Simplify right side
    6,128.11x = 43,786,150.60
  5. Step 5: Solve for x
    x = 43,786,150.60/6,128.11
  6. Step 6: Final answer
    x = 7,145.13

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.