Home / 20,831.90-31,252.80-6,792.02

Finding the Fourth Proportional to 20,831.90, 31,252.80 and 6,792.02

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Solution

The fourth proportional to 20,831.90, 31,252.80 and 6,792.02 is: 10,189.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.90 : 31,252.80 = 6,792.02 : x
  2. Step 2: Convert to fraction form
    20,831.90/31,252.80 = 6,792.02/x
  3. Step 3: Cross multiply
    20,831.90x = 31,252.80 × 6,792.02
  4. Step 4: Simplify right side
    20,831.90x = 212,269,642.66
  5. Step 5: Solve for x
    x = 212,269,642.66/20,831.90
  6. Step 6: Final answer
    x = 10,189.64

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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.