Home / 20,819.20-28,732.35-11,864.83

Finding the Fourth Proportional to 20,819.20, 28,732.35 and 11,864.83

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Solution

The fourth proportional to 20,819.20, 28,732.35 and 11,864.83 is: 16,374.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.20 : 28,732.35 = 11,864.83 : x
  2. Step 2: Convert to fraction form
    20,819.20/28,732.35 = 11,864.83/x
  3. Step 3: Cross multiply
    20,819.20x = 28,732.35 × 11,864.83
  4. Step 4: Simplify right side
    20,819.20x = 340,904,448.25
  5. Step 5: Solve for x
    x = 340,904,448.25/20,819.20
  6. Step 6: Final answer
    x = 16,374.52

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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.