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Finding the Fourth Proportional to 28,648.75, 42,990.41 and 12,232.75

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Solution

The fourth proportional to 28,648.75, 42,990.41 and 12,232.75 is: 18,356.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,648.75 : 42,990.41 = 12,232.75 : x
  2. Step 2: Convert to fraction form
    28,648.75/42,990.41 = 12,232.75/x
  3. Step 3: Cross multiply
    28,648.75x = 42,990.41 × 12,232.75
  4. Step 4: Simplify right side
    28,648.75x = 525,890,937.93
  5. Step 5: Solve for x
    x = 525,890,937.93/28,648.75
  6. Step 6: Final answer
    x = 18,356.51

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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.