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Finding the Fourth Proportional to 30,605.80, 45,843.90 and 20,108.20

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Solution

The fourth proportional to 30,605.80, 45,843.90 and 20,108.20 is: 30,119.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,605.80 : 45,843.90 = 20,108.20 : x
  2. Step 2: Convert to fraction form
    30,605.80/45,843.90 = 20,108.20/x
  3. Step 3: Cross multiply
    30,605.80x = 45,843.90 × 20,108.20
  4. Step 4: Simplify right side
    30,605.80x = 921,838,309.98
  5. Step 5: Solve for x
    x = 921,838,309.98/30,605.80
  6. Step 6: Final answer
    x = 30,119.73

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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.