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Finding the Fourth Proportional to 18,819.12, 28,230.08 and 6,339.20

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Solution

The fourth proportional to 18,819.12, 28,230.08 and 6,339.20 is: 9,509.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.12 : 28,230.08 = 6,339.20 : x
  2. Step 2: Convert to fraction form
    18,819.12/28,230.08 = 6,339.20/x
  3. Step 3: Cross multiply
    18,819.12x = 28,230.08 × 6,339.20
  4. Step 4: Simplify right side
    18,819.12x = 178,956,123.14
  5. Step 5: Solve for x
    x = 178,956,123.14/18,819.12
  6. Step 6: Final answer
    x = 9,509.27

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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.