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Finding the Fourth Proportional to 18,056.12, 27,080.17 and 13,128.08

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Solution

The fourth proportional to 18,056.12, 27,080.17 and 13,128.08 is: 19,689.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,056.12 : 27,080.17 = 13,128.08 : x
  2. Step 2: Convert to fraction form
    18,056.12/27,080.17 = 13,128.08/x
  3. Step 3: Cross multiply
    18,056.12x = 27,080.17 × 13,128.08
  4. Step 4: Simplify right side
    18,056.12x = 355,510,469.95
  5. Step 5: Solve for x
    x = 355,510,469.95/18,056.12
  6. Step 6: Final answer
    x = 19,689.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.