Home / 21,772.21-30,046.84-12,215.12

Finding the Fourth Proportional to 21,772.21, 30,046.84 and 12,215.12

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Solution

The fourth proportional to 21,772.21, 30,046.84 and 12,215.12 is: 16,857.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,772.21 : 30,046.84 = 12,215.12 : x
  2. Step 2: Convert to fraction form
    21,772.21/30,046.84 = 12,215.12/x
  3. Step 3: Cross multiply
    21,772.21x = 30,046.84 × 12,215.12
  4. Step 4: Simplify right side
    21,772.21x = 367,025,695.15
  5. Step 5: Solve for x
    x = 367,025,695.15/21,772.21
  6. Step 6: Final answer
    x = 16,857.53

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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.