Home / 20,633.13-28,480.20-13,181.13

Finding the Fourth Proportional to 20,633.13, 28,480.20 and 13,181.13

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Solution

The fourth proportional to 20,633.13, 28,480.20 and 13,181.13 is: 18,194.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,633.13 : 28,480.20 = 13,181.13 : x
  2. Step 2: Convert to fraction form
    20,633.13/28,480.20 = 13,181.13/x
  3. Step 3: Cross multiply
    20,633.13x = 28,480.20 × 13,181.13
  4. Step 4: Simplify right side
    20,633.13x = 375,401,010.32
  5. Step 5: Solve for x
    x = 375,401,010.32/20,633.13
  6. Step 6: Final answer
    x = 18,194.09

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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.