Home / 21,290.22-31,939.20-7,249.58

Finding the Fourth Proportional to 21,290.22, 31,939.20 and 7,249.58

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Solution

The fourth proportional to 21,290.22, 31,939.20 and 7,249.58 is: 10,875.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.22 : 31,939.20 = 7,249.58 : x
  2. Step 2: Convert to fraction form
    21,290.22/31,939.20 = 7,249.58/x
  3. Step 3: Cross multiply
    21,290.22x = 31,939.20 × 7,249.58
  4. Step 4: Simplify right side
    21,290.22x = 231,545,625.84
  5. Step 5: Solve for x
    x = 231,545,625.84/21,290.22
  6. Step 6: Final answer
    x = 10,875.68

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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.