Home / 20,831.19-31,215.46-8,338.83

Finding the Fourth Proportional to 20,831.19, 31,215.46 and 8,338.83

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Solution

The fourth proportional to 20,831.19, 31,215.46 and 8,338.83 is: 12,495.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.19 : 31,215.46 = 8,338.83 : x
  2. Step 2: Convert to fraction form
    20,831.19/31,215.46 = 8,338.83/x
  3. Step 3: Cross multiply
    20,831.19x = 31,215.46 × 8,338.83
  4. Step 4: Simplify right side
    20,831.19x = 260,300,237.39
  5. Step 5: Solve for x
    x = 260,300,237.39/20,831.19
  6. Step 6: Final answer
    x = 12,495.70

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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.