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Finding the Fourth Proportional to 28,625.40, 42,939.32 and 8,904.33

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Solution

The fourth proportional to 28,625.40, 42,939.32 and 8,904.33 is: 13,356.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,625.40 : 42,939.32 = 8,904.33 : x
  2. Step 2: Convert to fraction form
    28,625.40/42,939.32 = 8,904.33/x
  3. Step 3: Cross multiply
    28,625.40x = 42,939.32 × 8,904.33
  4. Step 4: Simplify right side
    28,625.40x = 382,345,830.73
  5. Step 5: Solve for x
    x = 382,345,830.73/28,625.40
  6. Step 6: Final answer
    x = 13,356.87

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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.