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Finding the Fourth Proportional to 12,441.90, 18,650.70 and 11,129.70

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Solution

The fourth proportional to 12,441.90, 18,650.70 and 11,129.70 is: 16,683.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,441.90 : 18,650.70 = 11,129.70 : x
  2. Step 2: Convert to fraction form
    12,441.90/18,650.70 = 11,129.70/x
  3. Step 3: Cross multiply
    12,441.90x = 18,650.70 × 11,129.70
  4. Step 4: Simplify right side
    12,441.90x = 207,576,695.79
  5. Step 5: Solve for x
    x = 207,576,695.79/12,441.90
  6. Step 6: Final answer
    x = 16,683.68

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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.