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Finding the Fourth Proportional to 19,794.20, 29,715.60 and 10,916.60

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Solution

The fourth proportional to 19,794.20, 29,715.60 and 10,916.60 is: 16,388.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,794.20 : 29,715.60 = 10,916.60 : x
  2. Step 2: Convert to fraction form
    19,794.20/29,715.60 = 10,916.60/x
  3. Step 3: Cross multiply
    19,794.20x = 29,715.60 × 10,916.60
  4. Step 4: Simplify right side
    19,794.20x = 324,393,318.96
  5. Step 5: Solve for x
    x = 324,393,318.96/19,794.20
  6. Step 6: Final answer
    x = 16,388.30

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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.