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Finding the Fourth Proportional to 19,441.80, 29,138.70 and 13,201.80

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Solution

The fourth proportional to 19,441.80, 29,138.70 and 13,201.80 is: 19,786.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,441.80 : 29,138.70 = 13,201.80 : x
  2. Step 2: Convert to fraction form
    19,441.80/29,138.70 = 13,201.80/x
  3. Step 3: Cross multiply
    19,441.80x = 29,138.70 × 13,201.80
  4. Step 4: Simplify right side
    19,441.80x = 384,683,289.66
  5. Step 5: Solve for x
    x = 384,683,289.66/19,441.80
  6. Step 6: Final answer
    x = 19,786.40

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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.