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Finding the Fourth Proportional to 18,965.96, 28,466.41 and 9,612.61

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Solution

The fourth proportional to 18,965.96, 28,466.41 and 9,612.61 is: 14,427.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.96 : 28,466.41 = 9,612.61 : x
  2. Step 2: Convert to fraction form
    18,965.96/28,466.41 = 9,612.61/x
  3. Step 3: Cross multiply
    18,965.96x = 28,466.41 × 9,612.61
  4. Step 4: Simplify right side
    18,965.96x = 273,636,545.03
  5. Step 5: Solve for x
    x = 273,636,545.03/18,965.96
  6. Step 6: Final answer
    x = 14,427.78

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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.