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Finding the Fourth Proportional to 18,819.15, 28,230.10 and 5,672.55

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Solution

The fourth proportional to 18,819.15, 28,230.10 and 5,672.55 is: 8,509.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.15 : 28,230.10 = 5,672.55 : x
  2. Step 2: Convert to fraction form
    18,819.15/28,230.10 = 5,672.55/x
  3. Step 3: Cross multiply
    18,819.15x = 28,230.10 × 5,672.55
  4. Step 4: Simplify right side
    18,819.15x = 160,136,625.39
  5. Step 5: Solve for x
    x = 160,136,625.39/18,819.15
  6. Step 6: Final answer
    x = 8,509.24

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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.