Home / 21,198.36-29,247.73-13,649.06

Finding the Fourth Proportional to 21,198.36, 29,247.73 and 13,649.06

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Solution

The fourth proportional to 21,198.36, 29,247.73 and 13,649.06 is: 18,831.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,198.36 : 29,247.73 = 13,649.06 : x
  2. Step 2: Convert to fraction form
    21,198.36/29,247.73 = 13,649.06/x
  3. Step 3: Cross multiply
    21,198.36x = 29,247.73 × 13,649.06
  4. Step 4: Simplify right side
    21,198.36x = 399,203,972.89
  5. Step 5: Solve for x
    x = 399,203,972.89/21,198.36
  6. Step 6: Final answer
    x = 18,831.83

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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.