Home / 20,730.78-31,095.85-5,148.54

Finding the Fourth Proportional to 20,730.78, 31,095.85 and 5,148.54

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Solution

The fourth proportional to 20,730.78, 31,095.85 and 5,148.54 is: 7,722.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.78 : 31,095.85 = 5,148.54 : x
  2. Step 2: Convert to fraction form
    20,730.78/31,095.85 = 5,148.54/x
  3. Step 3: Cross multiply
    20,730.78x = 31,095.85 × 5,148.54
  4. Step 4: Simplify right side
    20,730.78x = 160,098,227.56
  5. Step 5: Solve for x
    x = 160,098,227.56/20,730.78
  6. Step 6: Final answer
    x = 7,722.73

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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.