Home / 20,831.06-31,215.27-8,338.70

Finding the Fourth Proportional to 20,831.06, 31,215.27 and 8,338.70

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Solution

The fourth proportional to 20,831.06, 31,215.27 and 8,338.70 is: 12,495.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.06 : 31,215.27 = 8,338.70 : x
  2. Step 2: Convert to fraction form
    20,831.06/31,215.27 = 8,338.70/x
  3. Step 3: Cross multiply
    20,831.06x = 31,215.27 × 8,338.70
  4. Step 4: Simplify right side
    20,831.06x = 260,294,771.95
  5. Step 5: Solve for x
    x = 260,294,771.95/20,831.06
  6. Step 6: Final answer
    x = 12,495.51

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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.