Home / 19,890.66-29,831.36-8,791.30

Finding the Fourth Proportional to 19,890.66, 29,831.36 and 8,791.30

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Solution

The fourth proportional to 19,890.66, 29,831.36 and 8,791.30 is: 13,184.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.66 : 29,831.36 = 8,791.30 : x
  2. Step 2: Convert to fraction form
    19,890.66/29,831.36 = 8,791.30/x
  3. Step 3: Cross multiply
    19,890.66x = 29,831.36 × 8,791.30
  4. Step 4: Simplify right side
    19,890.66x = 262,256,435.17
  5. Step 5: Solve for x
    x = 262,256,435.17/19,890.66
  6. Step 6: Final answer
    x = 13,184.90

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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.