Home / 13,781.28-20,670.83-4,418.81

Finding the Fourth Proportional to 13,781.28, 20,670.83 and 4,418.81

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Solution

The fourth proportional to 13,781.28, 20,670.83 and 4,418.81 is: 6,627.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.28 : 20,670.83 = 4,418.81 : x
  2. Step 2: Convert to fraction form
    13,781.28/20,670.83 = 4,418.81/x
  3. Step 3: Cross multiply
    13,781.28x = 20,670.83 × 4,418.81
  4. Step 4: Simplify right side
    13,781.28x = 91,340,470.31
  5. Step 5: Solve for x
    x = 91,340,470.31/13,781.28
  6. Step 6: Final answer
    x = 6,627.87

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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.