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Finding the Fourth Proportional to 13,481.84, 20,117.29 and 12,080.91

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Solution

The fourth proportional to 13,481.84, 20,117.29 and 12,080.91 is: 18,026.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,481.84 : 20,117.29 = 12,080.91 : x
  2. Step 2: Convert to fraction form
    13,481.84/20,117.29 = 12,080.91/x
  3. Step 3: Cross multiply
    13,481.84x = 20,117.29 × 12,080.91
  4. Step 4: Simplify right side
    13,481.84x = 243,035,089.44
  5. Step 5: Solve for x
    x = 243,035,089.44/13,481.84
  6. Step 6: Final answer
    x = 18,026.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.