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Finding the Fourth Proportional to 28,410.75, 42,635.57 and 9,942.75

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Solution

The fourth proportional to 28,410.75, 42,635.57 and 9,942.75 is: 14,920.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,410.75 : 42,635.57 = 9,942.75 : x
  2. Step 2: Convert to fraction form
    28,410.75/42,635.57 = 9,942.75/x
  3. Step 3: Cross multiply
    28,410.75x = 42,635.57 × 9,942.75
  4. Step 4: Simplify right side
    28,410.75x = 423,914,763.90
  5. Step 5: Solve for x
    x = 423,914,763.90/28,410.75
  6. Step 6: Final answer
    x = 14,920.93

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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.