Home / 21,205.20-31,812.80-6,414.24

Finding the Fourth Proportional to 21,205.20, 31,812.80 and 6,414.24

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Solution

The fourth proportional to 21,205.20, 31,812.80 and 6,414.24 is: 9,622.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,205.20 : 31,812.80 = 6,414.24 : x
  2. Step 2: Convert to fraction form
    21,205.20/31,812.80 = 6,414.24/x
  3. Step 3: Cross multiply
    21,205.20x = 31,812.80 × 6,414.24
  4. Step 4: Simplify right side
    21,205.20x = 204,054,902.20
  5. Step 5: Solve for x
    x = 204,054,902.20/21,205.20
  6. Step 6: Final answer
    x = 9,622.87

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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.