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Finding the Fourth Proportional to 19,793.20, 29,714.10 and 10,915.60

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Solution

The fourth proportional to 19,793.20, 29,714.10 and 10,915.60 is: 16,386.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,793.20 : 29,714.10 = 10,915.60 : x
  2. Step 2: Convert to fraction form
    19,793.20/29,714.10 = 10,915.60/x
  3. Step 3: Cross multiply
    19,793.20x = 29,714.10 × 10,915.60
  4. Step 4: Simplify right side
    19,793.20x = 324,347,229.96
  5. Step 5: Solve for x
    x = 324,347,229.96/19,793.20
  6. Step 6: Final answer
    x = 16,386.80

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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.