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Finding the Fourth Proportional to 19,240.60, 28,860.90 and 18,511.60

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Solution

The fourth proportional to 19,240.60, 28,860.90 and 18,511.60 is: 27,767.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,240.60 : 28,860.90 = 18,511.60 : x
  2. Step 2: Convert to fraction form
    19,240.60/28,860.90 = 18,511.60/x
  3. Step 3: Cross multiply
    19,240.60x = 28,860.90 × 18,511.60
  4. Step 4: Simplify right side
    19,240.60x = 534,261,436.44
  5. Step 5: Solve for x
    x = 534,261,436.44/19,240.60
  6. Step 6: Final answer
    x = 27,767.40

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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.