Home / 21,022.62-31,529.97-7,872.18

Finding the Fourth Proportional to 21,022.62, 31,529.97 and 7,872.18

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Solution

The fourth proportional to 21,022.62, 31,529.97 and 7,872.18 is: 11,806.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.62 : 31,529.97 = 7,872.18 : x
  2. Step 2: Convert to fraction form
    21,022.62/31,529.97 = 7,872.18/x
  3. Step 3: Cross multiply
    21,022.62x = 31,529.97 × 7,872.18
  4. Step 4: Simplify right side
    21,022.62x = 248,209,599.23
  5. Step 5: Solve for x
    x = 248,209,599.23/21,022.62
  6. Step 6: Final answer
    x = 11,806.79

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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.