Home / 19,517.40-29,270.70-7,831.80

Finding the Fourth Proportional to 19,517.40, 29,270.70 and 7,831.80

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Solution

The fourth proportional to 19,517.40, 29,270.70 and 7,831.80 is: 11,745.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,517.40 : 29,270.70 = 7,831.80 : x
  2. Step 2: Convert to fraction form
    19,517.40/29,270.70 = 7,831.80/x
  3. Step 3: Cross multiply
    19,517.40x = 29,270.70 × 7,831.80
  4. Step 4: Simplify right side
    19,517.40x = 229,242,268.26
  5. Step 5: Solve for x
    x = 229,242,268.26/19,517.40
  6. Step 6: Final answer
    x = 11,745.53

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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.