Home / 21,181.84-31,747.12-11,811.92

Finding the Fourth Proportional to 21,181.84, 31,747.12 and 11,811.92

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Solution

The fourth proportional to 21,181.84, 31,747.12 and 11,811.92 is: 17,703.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.84 : 31,747.12 = 11,811.92 : x
  2. Step 2: Convert to fraction form
    21,181.84/31,747.12 = 11,811.92/x
  3. Step 3: Cross multiply
    21,181.84x = 31,747.12 × 11,811.92
  4. Step 4: Simplify right side
    21,181.84x = 374,994,441.67
  5. Step 5: Solve for x
    x = 374,994,441.67/21,181.84
  6. Step 6: Final answer
    x = 17,703.58

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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.