Home / 13,410.36-20,105.82-6,480

Finding the Fourth Proportional to 13,410.36, 20,105.82 and 6,480

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Solution

The fourth proportional to 13,410.36, 20,105.82 and 6,480 is: 9,715.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,410.36 : 20,105.82 = 6,480 : x
  2. Step 2: Convert to fraction form
    13,410.36/20,105.82 = 6,480/x
  3. Step 3: Cross multiply
    13,410.36x = 20,105.82 × 6,480
  4. Step 4: Simplify right side
    13,410.36x = 130,285,713.60
  5. Step 5: Solve for x
    x = 130,285,713.60/13,410.36
  6. Step 6: Final answer
    x = 9,715.30

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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.