Home / 13,388.12-18,476.10-8,081.91

Finding the Fourth Proportional to 13,388.12, 18,476.10 and 8,081.91

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Solution

The fourth proportional to 13,388.12, 18,476.10 and 8,081.91 is: 11,153.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,388.12 : 18,476.10 = 8,081.91 : x
  2. Step 2: Convert to fraction form
    13,388.12/18,476.10 = 8,081.91/x
  3. Step 3: Cross multiply
    13,388.12x = 18,476.10 × 8,081.91
  4. Step 4: Simplify right side
    13,388.12x = 149,322,136.94
  5. Step 5: Solve for x
    x = 149,322,136.94/13,388.12
  6. Step 6: Final answer
    x = 11,153.34

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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.