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Finding the Fourth Proportional to 12,571.65, 18,857.47 and 3,211.69

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Solution

The fourth proportional to 12,571.65, 18,857.47 and 3,211.69 is: 4,817.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,571.65 : 18,857.47 = 3,211.69 : x
  2. Step 2: Convert to fraction form
    12,571.65/18,857.47 = 3,211.69/x
  3. Step 3: Cross multiply
    12,571.65x = 18,857.47 × 3,211.69
  4. Step 4: Simplify right side
    12,571.65x = 60,564,308.71
  5. Step 5: Solve for x
    x = 60,564,308.71/12,571.65
  6. Step 6: Final answer
    x = 4,817.53

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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.