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Finding the Fourth Proportional to 12,015, 16,579.56 and 6,979.09

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Solution

The fourth proportional to 12,015, 16,579.56 and 6,979.09 is: 9,630.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,015 : 16,579.56 = 6,979.09 : x
  2. Step 2: Convert to fraction form
    12,015/16,579.56 = 6,979.09/x
  3. Step 3: Cross multiply
    12,015x = 16,579.56 × 6,979.09
  4. Step 4: Simplify right side
    12,015x = 115,710,241.40
  5. Step 5: Solve for x
    x = 115,710,241.40/12,015
  6. Step 6: Final answer
    x = 9,630.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.