Home / 21,181.23-29,231.48-12,229.11

Finding the Fourth Proportional to 21,181.23, 29,231.48 and 12,229.11

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Solution

The fourth proportional to 21,181.23, 29,231.48 and 12,229.11 is: 16,876.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.23 : 29,231.48 = 12,229.11 : x
  2. Step 2: Convert to fraction form
    21,181.23/29,231.48 = 12,229.11/x
  3. Step 3: Cross multiply
    21,181.23x = 29,231.48 × 12,229.11
  4. Step 4: Simplify right side
    21,181.23x = 357,475,014.96
  5. Step 5: Solve for x
    x = 357,475,014.96/21,181.23
  6. Step 6: Final answer
    x = 16,876.97

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1.5x scale

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.