Home / 21,936.30-32,912.55-7,145.70

Finding the Fourth Proportional to 21,936.30, 32,912.55 and 7,145.70

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Solution

The fourth proportional to 21,936.30, 32,912.55 and 7,145.70 is: 10,721.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,936.30 : 32,912.55 = 7,145.70 : x
  2. Step 2: Convert to fraction form
    21,936.30/32,912.55 = 7,145.70/x
  3. Step 3: Cross multiply
    21,936.30x = 32,912.55 × 7,145.70
  4. Step 4: Simplify right side
    21,936.30x = 235,183,208.54
  5. Step 5: Solve for x
    x = 235,183,208.54/21,936.30
  6. Step 6: Final answer
    x = 10,721.19

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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.