Home / 20,788.90-28,685.52-11,836.78

Finding the Fourth Proportional to 20,788.90, 28,685.52 and 11,836.78

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Solution

The fourth proportional to 20,788.90, 28,685.52 and 11,836.78 is: 16,332.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.90 : 28,685.52 = 11,836.78 : x
  2. Step 2: Convert to fraction form
    20,788.90/28,685.52 = 11,836.78/x
  3. Step 3: Cross multiply
    20,788.90x = 28,685.52 × 11,836.78
  4. Step 4: Simplify right side
    20,788.90x = 339,544,189.43
  5. Step 5: Solve for x
    x = 339,544,189.43/20,788.90
  6. Step 6: Final answer
    x = 16,332.96

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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.