Home / 20,876.11-28,810.20-12,383.26

Finding the Fourth Proportional to 20,876.11, 28,810.20 and 12,383.26

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Solution

The fourth proportional to 20,876.11, 28,810.20 and 12,383.26 is: 17,089.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.11 : 28,810.20 = 12,383.26 : x
  2. Step 2: Convert to fraction form
    20,876.11/28,810.20 = 12,383.26/x
  3. Step 3: Cross multiply
    20,876.11x = 28,810.20 × 12,383.26
  4. Step 4: Simplify right side
    20,876.11x = 356,764,197.25
  5. Step 5: Solve for x
    x = 356,764,197.25/20,876.11
  6. Step 6: Final answer
    x = 17,089.59

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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.