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Finding the Fourth Proportional to 20,797.48, 28,697.20 and 11,845.15

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Solution

The fourth proportional to 20,797.48, 28,697.20 and 11,845.15 is: 16,344.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797.48 : 28,697.20 = 11,845.15 : x
  2. Step 2: Convert to fraction form
    20,797.48/28,697.20 = 11,845.15/x
  3. Step 3: Cross multiply
    20,797.48x = 28,697.20 × 11,845.15
  4. Step 4: Simplify right side
    20,797.48x = 339,922,638.58
  5. Step 5: Solve for x
    x = 339,922,638.58/20,797.48
  6. Step 6: Final answer
    x = 16,344.41

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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.