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Finding the Fourth Proportional to 7,158.05, 9,873.11 and 6,917.21

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Solution

The fourth proportional to 7,158.05, 9,873.11 and 6,917.21 is: 9,540.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,158.05 : 9,873.11 = 6,917.21 : x
  2. Step 2: Convert to fraction form
    7,158.05/9,873.11 = 6,917.21/x
  3. Step 3: Cross multiply
    7,158.05x = 9,873.11 × 6,917.21
  4. Step 4: Simplify right side
    7,158.05x = 68,294,291.27
  5. Step 5: Solve for x
    x = 68,294,291.27/7,158.05
  6. Step 6: Final answer
    x = 9,540.91

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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.