Home / 18,819.34-28,229.03-4,780.42

Finding the Fourth Proportional to 18,819.34, 28,229.03 and 4,780.42

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Solution

The fourth proportional to 18,819.34, 28,229.03 and 4,780.42 is: 7,170.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.34 : 28,229.03 = 4,780.42 : x
  2. Step 2: Convert to fraction form
    18,819.34/28,229.03 = 4,780.42/x
  3. Step 3: Cross multiply
    18,819.34x = 28,229.03 × 4,780.42
  4. Step 4: Simplify right side
    18,819.34x = 134,946,619.59
  5. Step 5: Solve for x
    x = 134,946,619.59/18,819.34
  6. Step 6: Final answer
    x = 7,170.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.