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Finding the Fourth Proportional to 54,311.70, 81,447.57 and 18,763.91

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Solution

The fourth proportional to 54,311.70, 81,447.57 and 18,763.91 is: 28,138.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,311.70 : 81,447.57 = 18,763.91 : x
  2. Step 2: Convert to fraction form
    54,311.70/81,447.57 = 18,763.91/x
  3. Step 3: Cross multiply
    54,311.70x = 81,447.57 × 18,763.91
  4. Step 4: Simplify right side
    54,311.70x = 1,528,274,465.96
  5. Step 5: Solve for x
    x = 1,528,274,465.96/54,311.70
  6. Step 6: Final answer
    x = 28,138.95

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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.