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Finding the Fourth Proportional to 19,139.60, 28,644.60 and 16,806.80

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Solution

The fourth proportional to 19,139.60, 28,644.60 and 16,806.80 is: 25,153.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,139.60 : 28,644.60 = 16,806.80 : x
  2. Step 2: Convert to fraction form
    19,139.60/28,644.60 = 16,806.80/x
  3. Step 3: Cross multiply
    19,139.60x = 28,644.60 × 16,806.80
  4. Step 4: Simplify right side
    19,139.60x = 481,424,063.28
  5. Step 5: Solve for x
    x = 481,424,063.28/19,139.60
  6. Step 6: Final answer
    x = 25,153.30

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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.