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Finding the Fourth Proportional to 18,818.94, 28,223.52 and 8,938.56

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Solution

The fourth proportional to 18,818.94, 28,223.52 and 8,938.56 is: 13,405.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,818.94 : 28,223.52 = 8,938.56 : x
  2. Step 2: Convert to fraction form
    18,818.94/28,223.52 = 8,938.56/x
  3. Step 3: Cross multiply
    18,818.94x = 28,223.52 × 8,938.56
  4. Step 4: Simplify right side
    18,818.94x = 252,277,626.93
  5. Step 5: Solve for x
    x = 252,277,626.93/18,818.94
  6. Step 6: Final answer
    x = 13,405.52

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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.