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Finding the Fourth Proportional to 28,928.28, 43,404.78 and 9,208.44

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Solution

The fourth proportional to 28,928.28, 43,404.78 and 9,208.44 is: 13,816.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,928.28 : 43,404.78 = 9,208.44 : x
  2. Step 2: Convert to fraction form
    28,928.28/43,404.78 = 9,208.44/x
  3. Step 3: Cross multiply
    28,928.28x = 43,404.78 × 9,208.44
  4. Step 4: Simplify right side
    28,928.28x = 399,690,312.34
  5. Step 5: Solve for x
    x = 399,690,312.34/28,928.28
  6. Step 6: Final answer
    x = 13,816.59

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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.