Home / 21,195.66-31,859.10-13,453.68

Finding the Fourth Proportional to 21,195.66, 31,859.10 and 13,453.68

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Solution

The fourth proportional to 21,195.66, 31,859.10 and 13,453.68 is: 20,222.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195.66 : 31,859.10 = 13,453.68 : x
  2. Step 2: Convert to fraction form
    21,195.66/31,859.10 = 13,453.68/x
  3. Step 3: Cross multiply
    21,195.66x = 31,859.10 × 13,453.68
  4. Step 4: Simplify right side
    21,195.66x = 428,622,136.49
  5. Step 5: Solve for x
    x = 428,622,136.49/21,195.66
  6. Step 6: Final answer
    x = 20,222.17

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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.