Home / 20,831.67-31,248.09-9,142.20

Finding the Fourth Proportional to 20,831.67, 31,248.09 and 9,142.20

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Solution

The fourth proportional to 20,831.67, 31,248.09 and 9,142.20 is: 13,713.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.67 : 31,248.09 = 9,142.20 : x
  2. Step 2: Convert to fraction form
    20,831.67/31,248.09 = 9,142.20/x
  3. Step 3: Cross multiply
    20,831.67x = 31,248.09 × 9,142.20
  4. Step 4: Simplify right side
    20,831.67x = 285,676,288.40
  5. Step 5: Solve for x
    x = 285,676,288.40/20,831.67
  6. Step 6: Final answer
    x = 13,713.56

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1.5x scale

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.