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Finding the Fourth Proportional to 18,403.83, 25,404.92 and 13,928.83

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Solution

The fourth proportional to 18,403.83, 25,404.92 and 13,928.83 is: 19,227.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,403.83 : 25,404.92 = 13,928.83 : x
  2. Step 2: Convert to fraction form
    18,403.83/25,404.92 = 13,928.83/x
  3. Step 3: Cross multiply
    18,403.83x = 25,404.92 × 13,928.83
  4. Step 4: Simplify right side
    18,403.83x = 353,860,742.20
  5. Step 5: Solve for x
    x = 353,860,742.20/18,403.83
  6. Step 6: Final answer
    x = 19,227.56

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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.