Home / 20,802.29-31,203.42-5,219.91

Finding the Fourth Proportional to 20,802.29, 31,203.42 and 5,219.91

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Solution

The fourth proportional to 20,802.29, 31,203.42 and 5,219.91 is: 7,829.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.29 : 31,203.42 = 5,219.91 : x
  2. Step 2: Convert to fraction form
    20,802.29/31,203.42 = 5,219.91/x
  3. Step 3: Cross multiply
    20,802.29x = 31,203.42 × 5,219.91
  4. Step 4: Simplify right side
    20,802.29x = 162,879,044.09
  5. Step 5: Solve for x
    x = 162,879,044.09/20,802.29
  6. Step 6: Final answer
    x = 7,829.86

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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.