Home / 13,221.81-18,244.11-8,512.47

Finding the Fourth Proportional to 13,221.81, 18,244.11 and 8,512.47

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Solution

The fourth proportional to 13,221.81, 18,244.11 and 8,512.47 is: 11,745.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.81 : 18,244.11 = 8,512.47 : x
  2. Step 2: Convert to fraction form
    13,221.81/18,244.11 = 8,512.47/x
  3. Step 3: Cross multiply
    13,221.81x = 18,244.11 × 8,512.47
  4. Step 4: Simplify right side
    13,221.81x = 155,302,439.05
  5. Step 5: Solve for x
    x = 155,302,439.05/13,221.81
  6. Step 6: Final answer
    x = 11,745.93

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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.