Home / 20,580.82-28,401.33-11,149.22

Finding the Fourth Proportional to 20,580.82, 28,401.33 and 11,149.22

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Solution

The fourth proportional to 20,580.82, 28,401.33 and 11,149.22 is: 15,385.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.82 : 28,401.33 = 11,149.22 : x
  2. Step 2: Convert to fraction form
    20,580.82/28,401.33 = 11,149.22/x
  3. Step 3: Cross multiply
    20,580.82x = 28,401.33 × 11,149.22
  4. Step 4: Simplify right side
    20,580.82x = 316,652,676.46
  5. Step 5: Solve for x
    x = 316,652,676.46/20,580.82
  6. Step 6: Final answer
    x = 15,385.81

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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.