Home / 31,540.88-47,311.32-12,831.09

Finding the Fourth Proportional to 31,540.88, 47,311.32 and 12,831.09

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Solution

The fourth proportional to 31,540.88, 47,311.32 and 12,831.09 is: 19,246.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,540.88 : 47,311.32 = 12,831.09 : x
  2. Step 2: Convert to fraction form
    31,540.88/47,311.32 = 12,831.09/x
  3. Step 3: Cross multiply
    31,540.88x = 47,311.32 × 12,831.09
  4. Step 4: Simplify right side
    31,540.88x = 607,055,804.94
  5. Step 5: Solve for x
    x = 607,055,804.94/31,540.88
  6. Step 6: Final answer
    x = 19,246.64

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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.