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Finding the Fourth Proportional to 19,469.60, 29,139.60 and 17,136.80

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Solution

The fourth proportional to 19,469.60, 29,139.60 and 17,136.80 is: 25,648.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,469.60 : 29,139.60 = 17,136.80 : x
  2. Step 2: Convert to fraction form
    19,469.60/29,139.60 = 17,136.80/x
  3. Step 3: Cross multiply
    19,469.60x = 29,139.60 × 17,136.80
  4. Step 4: Simplify right side
    19,469.60x = 499,359,497.28
  5. Step 5: Solve for x
    x = 499,359,497.28/19,469.60
  6. Step 6: Final answer
    x = 25,648.16

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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.