Home / 31,720.05-47,545.74-20,634.66

Finding the Fourth Proportional to 31,720.05, 47,545.74 and 20,634.66

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Solution

The fourth proportional to 31,720.05, 47,545.74 and 20,634.66 is: 30,929.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,720.05 : 47,545.74 = 20,634.66 : x
  2. Step 2: Convert to fraction form
    31,720.05/47,545.74 = 20,634.66/x
  3. Step 3: Cross multiply
    31,720.05x = 47,545.74 × 20,634.66
  4. Step 4: Simplify right side
    31,720.05x = 981,090,179.35
  5. Step 5: Solve for x
    x = 981,090,179.35/31,720.05
  6. Step 6: Final answer
    x = 30,929.65

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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.