Home / 20,791.45-28,684.05-12,819.83

Finding the Fourth Proportional to 20,791.45, 28,684.05 and 12,819.83

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Solution

The fourth proportional to 20,791.45, 28,684.05 and 12,819.83 is: 17,686.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.45 : 28,684.05 = 12,819.83 : x
  2. Step 2: Convert to fraction form
    20,791.45/28,684.05 = 12,819.83/x
  3. Step 3: Cross multiply
    20,791.45x = 28,684.05 × 12,819.83
  4. Step 4: Simplify right side
    20,791.45x = 367,724,644.71
  5. Step 5: Solve for x
    x = 367,724,644.71/20,791.45
  6. Step 6: Final answer
    x = 17,686.34

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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.