Home / 20,800.39-28,704.12-11,847.66

Finding the Fourth Proportional to 20,800.39, 28,704.12 and 11,847.66

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Solution

The fourth proportional to 20,800.39, 28,704.12 and 11,847.66 is: 16,349.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.39 : 28,704.12 = 11,847.66 : x
  2. Step 2: Convert to fraction form
    20,800.39/28,704.12 = 11,847.66/x
  3. Step 3: Cross multiply
    20,800.39x = 28,704.12 × 11,847.66
  4. Step 4: Simplify right side
    20,800.39x = 340,076,654.36
  5. Step 5: Solve for x
    x = 340,076,654.36/20,800.39
  6. Step 6: Final answer
    x = 16,349.53

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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.