Home / 21,305.72-29,402.10-11,745.96

Finding the Fourth Proportional to 21,305.72, 29,402.10 and 11,745.96

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Solution

The fourth proportional to 21,305.72, 29,402.10 and 11,745.96 is: 16,209.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,305.72 : 29,402.10 = 11,745.96 : x
  2. Step 2: Convert to fraction form
    21,305.72/29,402.10 = 11,745.96/x
  3. Step 3: Cross multiply
    21,305.72x = 29,402.10 × 11,745.96
  4. Step 4: Simplify right side
    21,305.72x = 345,355,890.52
  5. Step 5: Solve for x
    x = 345,355,890.52/21,305.72
  6. Step 6: Final answer
    x = 16,209.54

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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.