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Finding the Fourth Proportional to 12,571.59, 18,859.82 and 4,779.80

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Solution

The fourth proportional to 12,571.59, 18,859.82 and 4,779.80 is: 7,170.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,571.59 : 18,859.82 = 4,779.80 : x
  2. Step 2: Convert to fraction form
    12,571.59/18,859.82 = 4,779.80/x
  3. Step 3: Cross multiply
    12,571.59x = 18,859.82 × 4,779.80
  4. Step 4: Simplify right side
    12,571.59x = 90,146,049.44
  5. Step 5: Solve for x
    x = 90,146,049.44/12,571.59
  6. Step 6: Final answer
    x = 7,170.62

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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.