Home / 21,339.80-29,443.02-13,786.43

Finding the Fourth Proportional to 21,339.80, 29,443.02 and 13,786.43

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Solution

The fourth proportional to 21,339.80, 29,443.02 and 13,786.43 is: 19,021.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,339.80 : 29,443.02 = 13,786.43 : x
  2. Step 2: Convert to fraction form
    21,339.80/29,443.02 = 13,786.43/x
  3. Step 3: Cross multiply
    21,339.80x = 29,443.02 × 13,786.43
  4. Step 4: Simplify right side
    21,339.80x = 405,914,134.22
  5. Step 5: Solve for x
    x = 405,914,134.22/21,339.80
  6. Step 6: Final answer
    x = 19,021.46

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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.