Home / 20,910.12-28,857.80-11,480.52

Finding the Fourth Proportional to 20,910.12, 28,857.80 and 11,480.52

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Solution

The fourth proportional to 20,910.12, 28,857.80 and 11,480.52 is: 15,844.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.12 : 28,857.80 = 11,480.52 : x
  2. Step 2: Convert to fraction form
    20,910.12/28,857.80 = 11,480.52/x
  3. Step 3: Cross multiply
    20,910.12x = 28,857.80 × 11,480.52
  4. Step 4: Simplify right side
    20,910.12x = 331,302,550.06
  5. Step 5: Solve for x
    x = 331,302,550.06/20,910.12
  6. Step 6: Final answer
    x = 15,844.12

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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.