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Finding the Fourth Proportional to 20,545.20, 30,817.80 and 18,730.80

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Solution

The fourth proportional to 20,545.20, 30,817.80 and 18,730.80 is: 28,096.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,545.20 : 30,817.80 = 18,730.80 : x
  2. Step 2: Convert to fraction form
    20,545.20/30,817.80 = 18,730.80/x
  3. Step 3: Cross multiply
    20,545.20x = 30,817.80 × 18,730.80
  4. Step 4: Simplify right side
    20,545.20x = 577,242,048.24
  5. Step 5: Solve for x
    x = 577,242,048.24/20,545.20
  6. Step 6: Final answer
    x = 28,096.20

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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.