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Finding the Fourth Proportional to 28,367.87, 42,558.12 and 8,647.97

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Solution

The fourth proportional to 28,367.87, 42,558.12 and 8,647.97 is: 12,973.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,367.87 : 42,558.12 = 8,647.97 : x
  2. Step 2: Convert to fraction form
    28,367.87/42,558.12 = 8,647.97/x
  3. Step 3: Cross multiply
    28,367.87x = 42,558.12 × 8,647.97
  4. Step 4: Simplify right side
    28,367.87x = 368,041,132.23
  5. Step 5: Solve for x
    x = 368,041,132.23/28,367.87
  6. Step 6: Final answer
    x = 12,973.87

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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.