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Finding the Fourth Proportional to 28,625.98, 42,933.50 and 8,904.78

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Solution

The fourth proportional to 28,625.98, 42,933.50 and 8,904.78 is: 13,355.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,625.98 : 42,933.50 = 8,904.78 : x
  2. Step 2: Convert to fraction form
    28,625.98/42,933.50 = 8,904.78/x
  3. Step 3: Cross multiply
    28,625.98x = 42,933.50 × 8,904.78
  4. Step 4: Simplify right side
    28,625.98x = 382,313,372.13
  5. Step 5: Solve for x
    x = 382,313,372.13/28,625.98
  6. Step 6: Final answer
    x = 13,355.47

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1.5x scale

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.