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Finding the Fourth Proportional to 18,117.20, 27,187.20 and 7,728.80

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Solution

The fourth proportional to 18,117.20, 27,187.20 and 7,728.80 is: 11,598.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,117.20 : 27,187.20 = 7,728.80 : x
  2. Step 2: Convert to fraction form
    18,117.20/27,187.20 = 7,728.80/x
  3. Step 3: Cross multiply
    18,117.20x = 27,187.20 × 7,728.80
  4. Step 4: Simplify right side
    18,117.20x = 210,124,431.36
  5. Step 5: Solve for x
    x = 210,124,431.36/18,117.20
  6. Step 6: Final answer
    x = 11,598.06

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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.