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Finding the Fourth Proportional to 12,005.80, 17,994.30 and 6,159.40

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Solution

The fourth proportional to 12,005.80, 17,994.30 and 6,159.40 is: 9,231.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,005.80 : 17,994.30 = 6,159.40 : x
  2. Step 2: Convert to fraction form
    12,005.80/17,994.30 = 6,159.40/x
  3. Step 3: Cross multiply
    12,005.80x = 17,994.30 × 6,159.40
  4. Step 4: Simplify right side
    12,005.80x = 110,834,091.42
  5. Step 5: Solve for x
    x = 110,834,091.42/12,005.80
  6. Step 6: Final answer
    x = 9,231.71

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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.