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Finding the Fourth Proportional to 19,153.60, 28,665.60 and 16,820.80

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Solution

The fourth proportional to 19,153.60, 28,665.60 and 16,820.80 is: 25,174.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,153.60 : 28,665.60 = 16,820.80 : x
  2. Step 2: Convert to fraction form
    19,153.60/28,665.60 = 16,820.80/x
  3. Step 3: Cross multiply
    19,153.60x = 28,665.60 × 16,820.80
  4. Step 4: Simplify right side
    19,153.60x = 482,178,324.48
  5. Step 5: Solve for x
    x = 482,178,324.48/19,153.60
  6. Step 6: Final answer
    x = 25,174.29

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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.