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Finding the Fourth Proportional to 12,453.50, 18,683.45 and 4,245.50

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Solution

The fourth proportional to 12,453.50, 18,683.45 and 4,245.50 is: 6,369.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,453.50 : 18,683.45 = 4,245.50 : x
  2. Step 2: Convert to fraction form
    12,453.50/18,683.45 = 4,245.50/x
  3. Step 3: Cross multiply
    12,453.50x = 18,683.45 × 4,245.50
  4. Step 4: Simplify right side
    12,453.50x = 79,320,586.98
  5. Step 5: Solve for x
    x = 79,320,586.98/12,453.50
  6. Step 6: Final answer
    x = 6,369.34

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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.