Home / 21,181.74-29,234.61-12,228

Finding the Fourth Proportional to 21,181.74, 29,234.61 and 12,228

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Solution

The fourth proportional to 21,181.74, 29,234.61 and 12,228 is: 16,876.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.74 : 29,234.61 = 12,228 : x
  2. Step 2: Convert to fraction form
    21,181.74/29,234.61 = 12,228/x
  3. Step 3: Cross multiply
    21,181.74x = 29,234.61 × 12,228
  4. Step 4: Simplify right side
    21,181.74x = 357,480,811.08
  5. Step 5: Solve for x
    x = 357,480,811.08/21,181.74
  6. Step 6: Final answer
    x = 16,876.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.