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Finding the Fourth Proportional to 18,006.18, 27,006.54 and 6,918.09

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Solution

The fourth proportional to 18,006.18, 27,006.54 and 6,918.09 is: 10,376.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,006.18 : 27,006.54 = 6,918.09 : x
  2. Step 2: Convert to fraction form
    18,006.18/27,006.54 = 6,918.09/x
  3. Step 3: Cross multiply
    18,006.18x = 27,006.54 × 6,918.09
  4. Step 4: Simplify right side
    18,006.18x = 186,833,674.31
  5. Step 5: Solve for x
    x = 186,833,674.31/18,006.18
  6. Step 6: Final answer
    x = 10,376.09

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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.