Home / 21,218.97-31,824.34-20,165.26

Finding the Fourth Proportional to 21,218.97, 31,824.34 and 20,165.26

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Solution

The fourth proportional to 21,218.97, 31,824.34 and 20,165.26 is: 30,243.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.97 : 31,824.34 = 20,165.26 : x
  2. Step 2: Convert to fraction form
    21,218.97/31,824.34 = 20,165.26/x
  3. Step 3: Cross multiply
    21,218.97x = 31,824.34 × 20,165.26
  4. Step 4: Simplify right side
    21,218.97x = 641,746,090.43
  5. Step 5: Solve for x
    x = 641,746,090.43/21,218.97
  6. Step 6: Final answer
    x = 30,243.98

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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.