Home / 20,431.16-28,197.03-13,730.73

Finding the Fourth Proportional to 20,431.16, 28,197.03 and 13,730.73

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Solution

The fourth proportional to 20,431.16, 28,197.03 and 13,730.73 is: 18,949.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.16 : 28,197.03 = 13,730.73 : x
  2. Step 2: Convert to fraction form
    20,431.16/28,197.03 = 13,730.73/x
  3. Step 3: Cross multiply
    20,431.16x = 28,197.03 × 13,730.73
  4. Step 4: Simplify right side
    20,431.16x = 387,165,805.73
  5. Step 5: Solve for x
    x = 387,165,805.73/20,431.16
  6. Step 6: Final answer
    x = 18,949.78

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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.