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Finding the Fourth Proportional to 18,116.63, 27,185.88 and 7,728.38

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Solution

The fourth proportional to 18,116.63, 27,185.88 and 7,728.38 is: 11,597.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,116.63 : 27,185.88 = 7,728.38 : x
  2. Step 2: Convert to fraction form
    18,116.63/27,185.88 = 7,728.38/x
  3. Step 3: Cross multiply
    18,116.63x = 27,185.88 × 7,728.38
  4. Step 4: Simplify right side
    18,116.63x = 210,102,675.35
  5. Step 5: Solve for x
    x = 210,102,675.35/18,116.63
  6. Step 6: Final answer
    x = 11,597.23

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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.