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Finding the Fourth Proportional to 28,616.44, 42,911.04 and 8,895.28

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Solution

The fourth proportional to 28,616.44, 42,911.04 and 8,895.28 is: 13,338.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,616.44 : 42,911.04 = 8,895.28 : x
  2. Step 2: Convert to fraction form
    28,616.44/42,911.04 = 8,895.28/x
  3. Step 3: Cross multiply
    28,616.44x = 42,911.04 × 8,895.28
  4. Step 4: Simplify right side
    28,616.44x = 381,705,715.89
  5. Step 5: Solve for x
    x = 381,705,715.89/28,616.44
  6. Step 6: Final answer
    x = 13,338.69

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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.