Home / 13,887.36-20,834.68-5,122.34

Finding the Fourth Proportional to 13,887.36, 20,834.68 and 5,122.34

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Solution

The fourth proportional to 13,887.36, 20,834.68 and 5,122.34 is: 7,684.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,887.36 : 20,834.68 = 5,122.34 : x
  2. Step 2: Convert to fraction form
    13,887.36/20,834.68 = 5,122.34/x
  3. Step 3: Cross multiply
    13,887.36x = 20,834.68 × 5,122.34
  4. Step 4: Simplify right side
    13,887.36x = 106,722,314.75
  5. Step 5: Solve for x
    x = 106,722,314.75/13,887.36
  6. Step 6: Final answer
    x = 7,684.85

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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.