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Finding the Fourth Proportional to 18,657.78, 25,749.56 and 13,933.86

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Solution

The fourth proportional to 18,657.78, 25,749.56 and 13,933.86 is: 19,230.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,657.78 : 25,749.56 = 13,933.86 : x
  2. Step 2: Convert to fraction form
    18,657.78/25,749.56 = 13,933.86/x
  3. Step 3: Cross multiply
    18,657.78x = 25,749.56 × 13,933.86
  4. Step 4: Simplify right side
    18,657.78x = 358,790,694.43
  5. Step 5: Solve for x
    x = 358,790,694.43/18,657.78
  6. Step 6: Final answer
    x = 19,230.08

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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.