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Finding the Fourth Proportional to 20,843.70, 28,777.74 and 18,601.74

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Solution

The fourth proportional to 20,843.70, 28,777.74 and 18,601.74 is: 25,682.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,843.70 : 28,777.74 = 18,601.74 : x
  2. Step 2: Convert to fraction form
    20,843.70/28,777.74 = 18,601.74/x
  3. Step 3: Cross multiply
    20,843.70x = 28,777.74 × 18,601.74
  4. Step 4: Simplify right side
    20,843.70x = 535,316,037.27
  5. Step 5: Solve for x
    x = 535,316,037.27/20,843.70
  6. Step 6: Final answer
    x = 25,682.39

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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.