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Finding the Fourth Proportional to 12,363.60, 18,545.40 and 6,121.20

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Solution

The fourth proportional to 12,363.60, 18,545.40 and 6,121.20 is: 9,181.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,363.60 : 18,545.40 = 6,121.20 : x
  2. Step 2: Convert to fraction form
    12,363.60/18,545.40 = 6,121.20/x
  3. Step 3: Cross multiply
    12,363.60x = 18,545.40 × 6,121.20
  4. Step 4: Simplify right side
    12,363.60x = 113,520,102.48
  5. Step 5: Solve for x
    x = 113,520,102.48/12,363.60
  6. Step 6: Final answer
    x = 9,181.80

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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.