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Finding the Fourth Proportional to 16,864, 25,278.72 and 7,009

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Solution

The fourth proportional to 16,864, 25,278.72 and 7,009 is: 10,506.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,864 : 25,278.72 = 7,009 : x
  2. Step 2: Convert to fraction form
    16,864/25,278.72 = 7,009/x
  3. Step 3: Cross multiply
    16,864x = 25,278.72 × 7,009
  4. Step 4: Simplify right side
    16,864x = 177,178,548.48
  5. Step 5: Solve for x
    x = 177,178,548.48/16,864
  6. Step 6: Final answer
    x = 10,506.32

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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.