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Finding the Fourth Proportional to 20,794.64, 28,697.20 and 11,363.80

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Solution

The fourth proportional to 20,794.64, 28,697.20 and 11,363.80 is: 15,682.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,794.64 : 28,697.20 = 11,363.80 : x
  2. Step 2: Convert to fraction form
    20,794.64/28,697.20 = 11,363.80/x
  3. Step 3: Cross multiply
    20,794.64x = 28,697.20 × 11,363.80
  4. Step 4: Simplify right side
    20,794.64x = 326,109,241.36
  5. Step 5: Solve for x
    x = 326,109,241.36/20,794.64
  6. Step 6: Final answer
    x = 15,682.37

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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.