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Finding the Fourth Proportional to 20,797.74, 28,697.54 and 11,845.40

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Solution

The fourth proportional to 20,797.74, 28,697.54 and 11,845.40 is: 16,344.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797.74 : 28,697.54 = 11,845.40 : x
  2. Step 2: Convert to fraction form
    20,797.74/28,697.54 = 11,845.40/x
  3. Step 3: Cross multiply
    20,797.74x = 28,697.54 × 11,845.40
  4. Step 4: Simplify right side
    20,797.74x = 339,933,840.32
  5. Step 5: Solve for x
    x = 339,933,840.32/20,797.74
  6. Step 6: Final answer
    x = 16,344.75

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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.