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Finding the Fourth Proportional to 9,891.81, 13,650.73 and 5,415.55

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Solution

The fourth proportional to 9,891.81, 13,650.73 and 5,415.55 is: 7,473.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,891.81 : 13,650.73 = 5,415.55 : x
  2. Step 2: Convert to fraction form
    9,891.81/13,650.73 = 5,415.55/x
  3. Step 3: Cross multiply
    9,891.81x = 13,650.73 × 5,415.55
  4. Step 4: Simplify right side
    9,891.81x = 73,926,163.19
  5. Step 5: Solve for x
    x = 73,926,163.19/9,891.81
  6. Step 6: Final answer
    x = 7,473.47

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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.