Home / 20,831.24-31,207.59-10,288.91

Finding the Fourth Proportional to 20,831.24, 31,207.59 and 10,288.91

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Solution

The fourth proportional to 20,831.24, 31,207.59 and 10,288.91 is: 15,413.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.24 : 31,207.59 = 10,288.91 : x
  2. Step 2: Convert to fraction form
    20,831.24/31,207.59 = 10,288.91/x
  3. Step 3: Cross multiply
    20,831.24x = 31,207.59 × 10,288.91
  4. Step 4: Simplify right side
    20,831.24x = 321,091,928.79
  5. Step 5: Solve for x
    x = 321,091,928.79/20,831.24
  6. Step 6: Final answer
    x = 15,413.97

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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.