Home / 13,638.03-18,821.91-8,336.39

Finding the Fourth Proportional to 13,638.03, 18,821.91 and 8,336.39

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Solution

The fourth proportional to 13,638.03, 18,821.91 and 8,336.39 is: 11,505.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.03 : 18,821.91 = 8,336.39 : x
  2. Step 2: Convert to fraction form
    13,638.03/18,821.91 = 8,336.39/x
  3. Step 3: Cross multiply
    13,638.03x = 18,821.91 × 8,336.39
  4. Step 4: Simplify right side
    13,638.03x = 156,906,688.20
  5. Step 5: Solve for x
    x = 156,906,688.20/13,638.03
  6. Step 6: Final answer
    x = 11,505.08

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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.