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Finding the Fourth Proportional to 18,643.14, 27,955.62 and 6,631.29

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Solution

The fourth proportional to 18,643.14, 27,955.62 and 6,631.29 is: 9,943.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.14 : 27,955.62 = 6,631.29 : x
  2. Step 2: Convert to fraction form
    18,643.14/27,955.62 = 6,631.29/x
  3. Step 3: Cross multiply
    18,643.14x = 27,955.62 × 6,631.29
  4. Step 4: Simplify right side
    18,643.14x = 185,381,823.35
  5. Step 5: Solve for x
    x = 185,381,823.35/18,643.14
  6. Step 6: Final answer
    x = 9,943.70

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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.