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Finding the Fourth Proportional to 19,771.60, 29,624.60 and 13,915.92

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Solution

The fourth proportional to 19,771.60, 29,624.60 and 13,915.92 is: 20,850.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,771.60 : 29,624.60 = 13,915.92 : x
  2. Step 2: Convert to fraction form
    19,771.60/29,624.60 = 13,915.92/x
  3. Step 3: Cross multiply
    19,771.60x = 29,624.60 × 13,915.92
  4. Step 4: Simplify right side
    19,771.60x = 412,253,563.63
  5. Step 5: Solve for x
    x = 412,253,563.63/19,771.60
  6. Step 6: Final answer
    x = 20,850.79

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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.