Home / 21,249.96-31,796.32-12,821.35

Finding the Fourth Proportional to 21,249.96, 31,796.32 and 12,821.35

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Solution

The fourth proportional to 21,249.96, 31,796.32 and 12,821.35 is: 19,184.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,249.96 : 31,796.32 = 12,821.35 : x
  2. Step 2: Convert to fraction form
    21,249.96/31,796.32 = 12,821.35/x
  3. Step 3: Cross multiply
    21,249.96x = 31,796.32 × 12,821.35
  4. Step 4: Simplify right side
    21,249.96x = 407,671,747.43
  5. Step 5: Solve for x
    x = 407,671,747.43/21,249.96
  6. Step 6: Final answer
    x = 19,184.59

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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.