Home / 20,353.92-28,067.76-13,638.48

Finding the Fourth Proportional to 20,353.92, 28,067.76 and 13,638.48

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Solution

The fourth proportional to 20,353.92, 28,067.76 and 13,638.48 is: 18,807.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,353.92 : 28,067.76 = 13,638.48 : x
  2. Step 2: Convert to fraction form
    20,353.92/28,067.76 = 13,638.48/x
  3. Step 3: Cross multiply
    20,353.92x = 28,067.76 × 13,638.48
  4. Step 4: Simplify right side
    20,353.92x = 382,801,583.40
  5. Step 5: Solve for x
    x = 382,801,583.40/20,353.92
  6. Step 6: Final answer
    x = 18,807.27

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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.