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Finding the Fourth Proportional to 19,000.30, 28,500.45 and 5,149.30

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Solution

The fourth proportional to 19,000.30, 28,500.45 and 5,149.30 is: 7,723.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,000.30 : 28,500.45 = 5,149.30 : x
  2. Step 2: Convert to fraction form
    19,000.30/28,500.45 = 5,149.30/x
  3. Step 3: Cross multiply
    19,000.30x = 28,500.45 × 5,149.30
  4. Step 4: Simplify right side
    19,000.30x = 146,757,367.19
  5. Step 5: Solve for x
    x = 146,757,367.19/19,000.30
  6. Step 6: Final answer
    x = 7,723.95

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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.