Home / 21,249.26-31,878.21-7,399.34

Finding the Fourth Proportional to 21,249.26, 31,878.21 and 7,399.34

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Solution

The fourth proportional to 21,249.26, 31,878.21 and 7,399.34 is: 11,100.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,249.26 : 31,878.21 = 7,399.34 : x
  2. Step 2: Convert to fraction form
    21,249.26/31,878.21 = 7,399.34/x
  3. Step 3: Cross multiply
    21,249.26x = 31,878.21 × 7,399.34
  4. Step 4: Simplify right side
    21,249.26x = 235,877,714.38
  5. Step 5: Solve for x
    x = 235,877,714.38/21,249.26
  6. Step 6: Final answer
    x = 11,100.51

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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.