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Finding the Fourth Proportional to 18,639.44, 27,961.06 and 6,159.50

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Solution

The fourth proportional to 18,639.44, 27,961.06 and 6,159.50 is: 9,239.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.44 : 27,961.06 = 6,159.50 : x
  2. Step 2: Convert to fraction form
    18,639.44/27,961.06 = 6,159.50/x
  3. Step 3: Cross multiply
    18,639.44x = 27,961.06 × 6,159.50
  4. Step 4: Simplify right side
    18,639.44x = 172,226,149.07
  5. Step 5: Solve for x
    x = 172,226,149.07/18,639.44
  6. Step 6: Final answer
    x = 9,239.88

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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.