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Finding the Fourth Proportional to 8,928.32, 13,394.64 and 2,688.32

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Solution

The fourth proportional to 8,928.32, 13,394.64 and 2,688.32 is: 4,033.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,928.32 : 13,394.64 = 2,688.32 : x
  2. Step 2: Convert to fraction form
    8,928.32/13,394.64 = 2,688.32/x
  3. Step 3: Cross multiply
    8,928.32x = 13,394.64 × 2,688.32
  4. Step 4: Simplify right side
    8,928.32x = 36,009,078.60
  5. Step 5: Solve for x
    x = 36,009,078.60/8,928.32
  6. Step 6: Final answer
    x = 4,033.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.