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Finding the Fourth Proportional to 12,474,148.80, 18,713,944.80 and 7,085,380.80

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Solution

The fourth proportional to 12,474,148.80, 18,713,944.80 and 7,085,380.80 is: 10,629,617.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,474,148.80 : 18,713,944.80 = 7,085,380.80 : x
  2. Step 2: Convert to fraction form
    12,474,148.80/18,713,944.80 = 7,085,380.80/x
  3. Step 3: Cross multiply
    12,474,148.80x = 18,713,944.80 × 7,085,380.80
  4. Step 4: Simplify right side
    12,474,148.80x = 132,595,425,178,179.84
  5. Step 5: Solve for x
    x = 132,595,425,178,179.84/12,474,148.80
  6. Step 6: Final answer
    x = 10,629,617.08

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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.