Home / 20,831.86-31,247.87-5,036.86

Finding the Fourth Proportional to 20,831.86, 31,247.87 and 5,036.86

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Solution

The fourth proportional to 20,831.86, 31,247.87 and 5,036.86 is: 7,555.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.86 : 31,247.87 = 5,036.86 : x
  2. Step 2: Convert to fraction form
    20,831.86/31,247.87 = 5,036.86/x
  3. Step 3: Cross multiply
    20,831.86x = 31,247.87 × 5,036.86
  4. Step 4: Simplify right side
    20,831.86x = 157,391,160.36
  5. Step 5: Solve for x
    x = 157,391,160.36/20,831.86
  6. Step 6: Final answer
    x = 7,555.31

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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.