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Finding the Fourth Proportional to 12,020.84, 18,009.72 and 7,338.44

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Solution

The fourth proportional to 12,020.84, 18,009.72 and 7,338.44 is: 10,994.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,020.84 : 18,009.72 = 7,338.44 : x
  2. Step 2: Convert to fraction form
    12,020.84/18,009.72 = 7,338.44/x
  3. Step 3: Cross multiply
    12,020.84x = 18,009.72 × 7,338.44
  4. Step 4: Simplify right side
    12,020.84x = 132,163,249.64
  5. Step 5: Solve for x
    x = 132,163,249.64/12,020.84
  6. Step 6: Final answer
    x = 10,994.51

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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.