Home / 19,930.86-29,879.32-8,831.49

Finding the Fourth Proportional to 19,930.86, 29,879.32 and 8,831.49

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Solution

The fourth proportional to 19,930.86, 29,879.32 and 8,831.49 is: 13,239.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,930.86 : 29,879.32 = 8,831.49 : x
  2. Step 2: Convert to fraction form
    19,930.86/29,879.32 = 8,831.49/x
  3. Step 3: Cross multiply
    19,930.86x = 29,879.32 × 8,831.49
  4. Step 4: Simplify right side
    19,930.86x = 263,878,995.89
  5. Step 5: Solve for x
    x = 263,878,995.89/19,930.86
  6. Step 6: Final answer
    x = 13,239.72

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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.