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Finding the Fourth Proportional to 19,149.20, 28,745.40 and 11,362.40

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Solution

The fourth proportional to 19,149.20, 28,745.40 and 11,362.40 is: 17,056.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,149.20 : 28,745.40 = 11,362.40 : x
  2. Step 2: Convert to fraction form
    19,149.20/28,745.40 = 11,362.40/x
  3. Step 3: Cross multiply
    19,149.20x = 28,745.40 × 11,362.40
  4. Step 4: Simplify right side
    19,149.20x = 326,616,732.96
  5. Step 5: Solve for x
    x = 326,616,732.96/19,149.20
  6. Step 6: Final answer
    x = 17,056.42

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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.