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Finding the Fourth Proportional to 18,793.30, 28,189.95 and 4,753.30

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Solution

The fourth proportional to 18,793.30, 28,189.95 and 4,753.30 is: 7,129.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.30 : 28,189.95 = 4,753.30 : x
  2. Step 2: Convert to fraction form
    18,793.30/28,189.95 = 4,753.30/x
  3. Step 3: Cross multiply
    18,793.30x = 28,189.95 × 4,753.30
  4. Step 4: Simplify right side
    18,793.30x = 133,995,289.34
  5. Step 5: Solve for x
    x = 133,995,289.34/18,793.30
  6. Step 6: Final answer
    x = 7,129.95

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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.