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Finding the Fourth Proportional to 12,628.98, 18,919.26 and 7,065.50

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Solution

The fourth proportional to 12,628.98, 18,919.26 and 7,065.50 is: 10,584.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,628.98 : 18,919.26 = 7,065.50 : x
  2. Step 2: Convert to fraction form
    12,628.98/18,919.26 = 7,065.50/x
  3. Step 3: Cross multiply
    12,628.98x = 18,919.26 × 7,065.50
  4. Step 4: Simplify right side
    12,628.98x = 133,673,936.93
  5. Step 5: Solve for x
    x = 133,673,936.93/12,628.98
  6. Step 6: Final answer
    x = 10,584.70

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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.