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Finding the Fourth Proportional to 8,928.32, 13,376.32 and 8,401.28

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Solution

The fourth proportional to 8,928.32, 13,376.32 and 8,401.28 is: 12,586.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,928.32 : 13,376.32 = 8,401.28 : x
  2. Step 2: Convert to fraction form
    8,928.32/13,376.32 = 8,401.28/x
  3. Step 3: Cross multiply
    8,928.32x = 13,376.32 × 8,401.28
  4. Step 4: Simplify right side
    8,928.32x = 112,378,209.69
  5. Step 5: Solve for x
    x = 112,378,209.69/8,928.32
  6. Step 6: Final answer
    x = 12,586.71

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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.