Home / 20,831.80-31,231.54-10,294.56

Finding the Fourth Proportional to 20,831.80, 31,231.54 and 10,294.56

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Solution

The fourth proportional to 20,831.80, 31,231.54 and 10,294.56 is: 15,433.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.80 : 31,231.54 = 10,294.56 : x
  2. Step 2: Convert to fraction form
    20,831.80/31,231.54 = 10,294.56/x
  3. Step 3: Cross multiply
    20,831.80x = 31,231.54 × 10,294.56
  4. Step 4: Simplify right side
    20,831.80x = 321,514,975.29
  5. Step 5: Solve for x
    x = 321,514,975.29/20,831.80
  6. Step 6: Final answer
    x = 15,433.86

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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.