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Finding the Fourth Proportional to 20,563.64, 28,375.72 and 11,948.48

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Solution

The fourth proportional to 20,563.64, 28,375.72 and 11,948.48 is: 16,487.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,563.64 : 28,375.72 = 11,948.48 : x
  2. Step 2: Convert to fraction form
    20,563.64/28,375.72 = 11,948.48/x
  3. Step 3: Cross multiply
    20,563.64x = 28,375.72 × 11,948.48
  4. Step 4: Simplify right side
    20,563.64x = 339,046,657.56
  5. Step 5: Solve for x
    x = 339,046,657.56/20,563.64
  6. Step 6: Final answer
    x = 16,487.68

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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.