Home / 21,220.38-29,267.24-13,667.34

Finding the Fourth Proportional to 21,220.38, 29,267.24 and 13,667.34

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Solution

The fourth proportional to 21,220.38, 29,267.24 and 13,667.34 is: 18,850.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.38 : 29,267.24 = 13,667.34 : x
  2. Step 2: Convert to fraction form
    21,220.38/29,267.24 = 13,667.34/x
  3. Step 3: Cross multiply
    21,220.38x = 29,267.24 × 13,667.34
  4. Step 4: Simplify right side
    21,220.38x = 400,005,251.60
  5. Step 5: Solve for x
    x = 400,005,251.60/21,220.38
  6. Step 6: Final answer
    x = 18,850.05

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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.