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Finding the Fourth Proportional to 6,516.72, 8,991.44 and 3,864

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Solution

The fourth proportional to 6,516.72, 8,991.44 and 3,864 is: 5,331.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,516.72 : 8,991.44 = 3,864 : x
  2. Step 2: Convert to fraction form
    6,516.72/8,991.44 = 3,864/x
  3. Step 3: Cross multiply
    6,516.72x = 8,991.44 × 3,864
  4. Step 4: Simplify right side
    6,516.72x = 34,742,924.16
  5. Step 5: Solve for x
    x = 34,742,924.16/6,516.72
  6. Step 6: Final answer
    x = 5,331.35

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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.