Home / 21,198.39-29,247.79-13,649.09

Finding the Fourth Proportional to 21,198.39, 29,247.79 and 13,649.09

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Solution

The fourth proportional to 21,198.39, 29,247.79 and 13,649.09 is: 18,831.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,198.39 : 29,247.79 = 13,649.09 : x
  2. Step 2: Convert to fraction form
    21,198.39/29,247.79 = 13,649.09/x
  3. Step 3: Cross multiply
    21,198.39x = 29,247.79 × 13,649.09
  4. Step 4: Simplify right side
    21,198.39x = 399,205,718.01
  5. Step 5: Solve for x
    x = 399,205,718.01/21,198.39
  6. Step 6: Final answer
    x = 18,831.89

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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.