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Finding the Fourth Proportional to 19,628.88, 27,079.16 and 13,081.88

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Solution

The fourth proportional to 19,628.88, 27,079.16 and 13,081.88 is: 18,047.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,628.88 : 27,079.16 = 13,081.88 : x
  2. Step 2: Convert to fraction form
    19,628.88/27,079.16 = 13,081.88/x
  3. Step 3: Cross multiply
    19,628.88x = 27,079.16 × 13,081.88
  4. Step 4: Simplify right side
    19,628.88x = 354,246,321.62
  5. Step 5: Solve for x
    x = 354,246,321.62/19,628.88
  6. Step 6: Final answer
    x = 18,047.20

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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.