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Finding the Fourth Proportional to 18,530.55, 27,787.38 and 7,995.58

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Solution

The fourth proportional to 18,530.55, 27,787.38 and 7,995.58 is: 11,989.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,530.55 : 27,787.38 = 7,995.58 : x
  2. Step 2: Convert to fraction form
    18,530.55/27,787.38 = 7,995.58/x
  3. Step 3: Cross multiply
    18,530.55x = 27,787.38 × 7,995.58
  4. Step 4: Simplify right side
    18,530.55x = 222,176,080.84
  5. Step 5: Solve for x
    x = 222,176,080.84/18,530.55
  6. Step 6: Final answer
    x = 11,989.72

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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.