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Finding the Fourth Proportional to 28,605.14, 42,907.71 and 8,883.87

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Solution

The fourth proportional to 28,605.14, 42,907.71 and 8,883.87 is: 13,325.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,605.14 : 42,907.71 = 8,883.87 : x
  2. Step 2: Convert to fraction form
    28,605.14/42,907.71 = 8,883.87/x
  3. Step 3: Cross multiply
    28,605.14x = 42,907.71 × 8,883.87
  4. Step 4: Simplify right side
    28,605.14x = 381,186,517.64
  5. Step 5: Solve for x
    x = 381,186,517.64/28,605.14
  6. Step 6: Final answer
    x = 13,325.81

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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.