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Finding the Fourth Proportional to 18,642.51, 27,954.93 and 6,787.89

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Solution

The fourth proportional to 18,642.51, 27,954.93 and 6,787.89 is: 10,178.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,642.51 : 27,954.93 = 6,787.89 : x
  2. Step 2: Convert to fraction form
    18,642.51/27,954.93 = 6,787.89/x
  3. Step 3: Cross multiply
    18,642.51x = 27,954.93 × 6,787.89
  4. Step 4: Simplify right side
    18,642.51x = 189,754,989.80
  5. Step 5: Solve for x
    x = 189,754,989.80/18,642.51
  6. Step 6: Final answer
    x = 10,178.62

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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.