Home / 13,912.16-20,869.38-5,591.09

Finding the Fourth Proportional to 13,912.16, 20,869.38 and 5,591.09

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Solution

The fourth proportional to 13,912.16, 20,869.38 and 5,591.09 is: 8,387.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,912.16 : 20,869.38 = 5,591.09 : x
  2. Step 2: Convert to fraction form
    13,912.16/20,869.38 = 5,591.09/x
  3. Step 3: Cross multiply
    13,912.16x = 20,869.38 × 5,591.09
  4. Step 4: Simplify right side
    13,912.16x = 116,682,477.48
  5. Step 5: Solve for x
    x = 116,682,477.48/13,912.16
  6. Step 6: Final answer
    x = 8,387.09

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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.