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Finding the Fourth Proportional to 13,101.92, 18,088.07 and 8,638.68

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Solution

The fourth proportional to 13,101.92, 18,088.07 and 8,638.68 is: 11,926.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,101.92 : 18,088.07 = 8,638.68 : x
  2. Step 2: Convert to fraction form
    13,101.92/18,088.07 = 8,638.68/x
  3. Step 3: Cross multiply
    13,101.92x = 18,088.07 × 8,638.68
  4. Step 4: Simplify right side
    13,101.92x = 156,257,048.55
  5. Step 5: Solve for x
    x = 156,257,048.55/13,101.92
  6. Step 6: Final answer
    x = 11,926.27

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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.