Home / 20,819.42-28,740.18-13,275.89

Finding the Fourth Proportional to 20,819.42, 28,740.18 and 13,275.89

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Solution

The fourth proportional to 20,819.42, 28,740.18 and 13,275.89 is: 18,326.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.42 : 28,740.18 = 13,275.89 : x
  2. Step 2: Convert to fraction form
    20,819.42/28,740.18 = 13,275.89/x
  3. Step 3: Cross multiply
    20,819.42x = 28,740.18 × 13,275.89
  4. Step 4: Simplify right side
    20,819.42x = 381,551,324.56
  5. Step 5: Solve for x
    x = 381,551,324.56/20,819.42
  6. Step 6: Final answer
    x = 18,326.71

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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.