Home / 20,730.18-31,095.24-5,147.80

Finding the Fourth Proportional to 20,730.18, 31,095.24 and 5,147.80

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Solution

The fourth proportional to 20,730.18, 31,095.24 and 5,147.80 is: 7,721.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.18 : 31,095.24 = 5,147.80 : x
  2. Step 2: Convert to fraction form
    20,730.18/31,095.24 = 5,147.80/x
  3. Step 3: Cross multiply
    20,730.18x = 31,095.24 × 5,147.80
  4. Step 4: Simplify right side
    20,730.18x = 160,072,076.47
  5. Step 5: Solve for x
    x = 160,072,076.47/20,730.18
  6. Step 6: Final answer
    x = 7,721.69

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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.