Home / 13,399.07-18,481.91-8,611.47

Finding the Fourth Proportional to 13,399.07, 18,481.91 and 8,611.47

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Solution

The fourth proportional to 13,399.07, 18,481.91 and 8,611.47 is: 11,878.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,399.07 : 18,481.91 = 8,611.47 : x
  2. Step 2: Convert to fraction form
    13,399.07/18,481.91 = 8,611.47/x
  3. Step 3: Cross multiply
    13,399.07x = 18,481.91 × 8,611.47
  4. Step 4: Simplify right side
    13,399.07x = 159,156,370.45
  5. Step 5: Solve for x
    x = 159,156,370.45/13,399.07
  6. Step 6: Final answer
    x = 11,878.17

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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.