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Finding the Fourth Proportional to 20,348.20, 28,545.80 and 20,348.20

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Solution

The fourth proportional to 20,348.20, 28,545.80 and 20,348.20 is: 28,545.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,348.20 : 28,545.80 = 20,348.20 : x
  2. Step 2: Convert to fraction form
    20,348.20/28,545.80 = 20,348.20/x
  3. Step 3: Cross multiply
    20,348.20x = 28,545.80 × 20,348.20
  4. Step 4: Simplify right side
    20,348.20x = 580,855,647.56
  5. Step 5: Solve for x
    x = 580,855,647.56/20,348.20
  6. Step 6: Final answer
    x = 28,545.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.