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Finding the Fourth Proportional to 12,179.96, 18,162.99 and 12,069.08

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Solution

The fourth proportional to 12,179.96, 18,162.99 and 12,069.08 is: 17,997.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,179.96 : 18,162.99 = 12,069.08 : x
  2. Step 2: Convert to fraction form
    12,179.96/18,162.99 = 12,069.08/x
  3. Step 3: Cross multiply
    12,179.96x = 18,162.99 × 12,069.08
  4. Step 4: Simplify right side
    12,179.96x = 219,210,579.35
  5. Step 5: Solve for x
    x = 219,210,579.35/12,179.96
  6. Step 6: Final answer
    x = 17,997.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.