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Finding the Fourth Proportional to 18,116.70, 27,186.45 and 7,728.30

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Solution

The fourth proportional to 18,116.70, 27,186.45 and 7,728.30 is: 11,597.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,116.70 : 27,186.45 = 7,728.30 : x
  2. Step 2: Convert to fraction form
    18,116.70/27,186.45 = 7,728.30/x
  3. Step 3: Cross multiply
    18,116.70x = 27,186.45 × 7,728.30
  4. Step 4: Simplify right side
    18,116.70x = 210,105,041.54
  5. Step 5: Solve for x
    x = 210,105,041.54/18,116.70
  6. Step 6: Final answer
    x = 11,597.31

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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.