Home / 20,640.82-28,484.45-11,209.46

Finding the Fourth Proportional to 20,640.82, 28,484.45 and 11,209.46

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Solution

The fourth proportional to 20,640.82, 28,484.45 and 11,209.46 is: 15,469.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.82 : 28,484.45 = 11,209.46 : x
  2. Step 2: Convert to fraction form
    20,640.82/28,484.45 = 11,209.46/x
  3. Step 3: Cross multiply
    20,640.82x = 28,484.45 × 11,209.46
  4. Step 4: Simplify right side
    20,640.82x = 319,295,302.90
  5. Step 5: Solve for x
    x = 319,295,302.90/20,640.82
  6. Step 6: Final answer
    x = 15,469.12

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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.