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Finding the Fourth Proportional to 18,819.32, 28,228.91 and 5,672.75

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Solution

The fourth proportional to 18,819.32, 28,228.91 and 5,672.75 is: 8,509.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.32 : 28,228.91 = 5,672.75 : x
  2. Step 2: Convert to fraction form
    18,819.32/28,228.91 = 5,672.75/x
  3. Step 3: Cross multiply
    18,819.32x = 28,228.91 × 5,672.75
  4. Step 4: Simplify right side
    18,819.32x = 160,135,379.69
  5. Step 5: Solve for x
    x = 160,135,379.69/18,819.32
  6. Step 6: Final answer
    x = 8,509.10

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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.