Home / 21,289.49-29,379.11-11,857.85

Finding the Fourth Proportional to 21,289.49, 29,379.11 and 11,857.85

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Solution

The fourth proportional to 21,289.49, 29,379.11 and 11,857.85 is: 16,363.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.49 : 29,379.11 = 11,857.85 : x
  2. Step 2: Convert to fraction form
    21,289.49/29,379.11 = 11,857.85/x
  3. Step 3: Cross multiply
    21,289.49x = 29,379.11 × 11,857.85
  4. Step 4: Simplify right side
    21,289.49x = 348,372,873.33
  5. Step 5: Solve for x
    x = 348,372,873.33/21,289.49
  6. Step 6: Final answer
    x = 16,363.61

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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.