Home / 30,545.46-45,789.99-21,189.90

Finding the Fourth Proportional to 30,545.46, 45,789.99 and 21,189.90

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Solution

The fourth proportional to 30,545.46, 45,789.99 and 21,189.90 is: 31,765.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,545.46 : 45,789.99 = 21,189.90 : x
  2. Step 2: Convert to fraction form
    30,545.46/45,789.99 = 21,189.90/x
  3. Step 3: Cross multiply
    30,545.46x = 45,789.99 × 21,189.90
  4. Step 4: Simplify right side
    30,545.46x = 970,285,309.10
  5. Step 5: Solve for x
    x = 970,285,309.10/30,545.46
  6. Step 6: Final answer
    x = 31,765.29

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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.