Home / 28,685.82-39,586.94-15,940.18

Finding the Fourth Proportional to 28,685.82, 39,586.94 and 15,940.18

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Solution

The fourth proportional to 28,685.82, 39,586.94 and 15,940.18 is: 21,997.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,685.82 : 39,586.94 = 15,940.18 : x
  2. Step 2: Convert to fraction form
    28,685.82/39,586.94 = 15,940.18/x
  3. Step 3: Cross multiply
    28,685.82x = 39,586.94 × 15,940.18
  4. Step 4: Simplify right side
    28,685.82x = 631,022,949.25
  5. Step 5: Solve for x
    x = 631,022,949.25/28,685.82
  6. Step 6: Final answer
    x = 21,997.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.