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Finding the Fourth Proportional to 8,928, 13,397.76 and 3,456

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Solution

The fourth proportional to 8,928, 13,397.76 and 3,456 is: 5,186.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,928 : 13,397.76 = 3,456 : x
  2. Step 2: Convert to fraction form
    8,928/13,397.76 = 3,456/x
  3. Step 3: Cross multiply
    8,928x = 13,397.76 × 3,456
  4. Step 4: Simplify right side
    8,928x = 46,302,658.56
  5. Step 5: Solve for x
    x = 46,302,658.56/8,928
  6. Step 6: Final answer
    x = 5,186.23

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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.