Home / 13,410.77-18,503.89-8,105.47

Finding the Fourth Proportional to 13,410.77, 18,503.89 and 8,105.47

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Solution

The fourth proportional to 13,410.77, 18,503.89 and 8,105.47 is: 11,183.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,410.77 : 18,503.89 = 8,105.47 : x
  2. Step 2: Convert to fraction form
    13,410.77/18,503.89 = 8,105.47/x
  3. Step 3: Cross multiply
    13,410.77x = 18,503.89 × 8,105.47
  4. Step 4: Simplify right side
    13,410.77x = 149,982,704.35
  5. Step 5: Solve for x
    x = 149,982,704.35/13,410.77
  6. Step 6: Final answer
    x = 11,183.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.