Home / 20,383.83-28,130.91-11,431.85

Finding the Fourth Proportional to 20,383.83, 28,130.91 and 11,431.85

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Solution

The fourth proportional to 20,383.83, 28,130.91 and 11,431.85 is: 15,776.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.83 : 28,130.91 = 11,431.85 : x
  2. Step 2: Convert to fraction form
    20,383.83/28,130.91 = 11,431.85/x
  3. Step 3: Cross multiply
    20,383.83x = 28,130.91 × 11,431.85
  4. Step 4: Simplify right side
    20,383.83x = 321,588,202.83
  5. Step 5: Solve for x
    x = 321,588,202.83/20,383.83
  6. Step 6: Final answer
    x = 15,776.63

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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.