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Finding the Fourth Proportional to 45,321.62, 67,992.15 and 19,011.20

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Solution

The fourth proportional to 45,321.62, 67,992.15 and 19,011.20 is: 28,520.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,321.62 : 67,992.15 = 19,011.20 : x
  2. Step 2: Convert to fraction form
    45,321.62/67,992.15 = 19,011.20/x
  3. Step 3: Cross multiply
    45,321.62x = 67,992.15 × 19,011.20
  4. Step 4: Simplify right side
    45,321.62x = 1,292,612,022.12
  5. Step 5: Solve for x
    x = 1,292,612,022.12/45,321.62
  6. Step 6: Final answer
    x = 28,520.87

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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.