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Finding the Fourth Proportional to 19,872.20, 29,829.90 and 11,124.20

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Solution

The fourth proportional to 19,872.20, 29,829.90 and 11,124.20 is: 16,698.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,872.20 : 29,829.90 = 11,124.20 : x
  2. Step 2: Convert to fraction form
    19,872.20/29,829.90 = 11,124.20/x
  3. Step 3: Cross multiply
    19,872.20x = 29,829.90 × 11,124.20
  4. Step 4: Simplify right side
    19,872.20x = 331,833,773.58
  5. Step 5: Solve for x
    x = 331,833,773.58/19,872.20
  6. Step 6: Final answer
    x = 16,698.39

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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.