Home / 20,831.10-31,246.64-5,249.94

Finding the Fourth Proportional to 20,831.10, 31,246.64 and 5,249.94

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Solution

The fourth proportional to 20,831.10, 31,246.64 and 5,249.94 is: 7,874.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.10 : 31,246.64 = 5,249.94 : x
  2. Step 2: Convert to fraction form
    20,831.10/31,246.64 = 5,249.94/x
  3. Step 3: Cross multiply
    20,831.10x = 31,246.64 × 5,249.94
  4. Step 4: Simplify right side
    20,831.10x = 164,042,985.20
  5. Step 5: Solve for x
    x = 164,042,985.20/20,831.10
  6. Step 6: Final answer
    x = 7,874.91

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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.