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Finding the Fourth Proportional to 18,974.84, 28,462.20 and 5,123.84

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Solution

The fourth proportional to 18,974.84, 28,462.20 and 5,123.84 is: 7,685.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,974.84 : 28,462.20 = 5,123.84 : x
  2. Step 2: Convert to fraction form
    18,974.84/28,462.20 = 5,123.84/x
  3. Step 3: Cross multiply
    18,974.84x = 28,462.20 × 5,123.84
  4. Step 4: Simplify right side
    18,974.84x = 145,835,758.85
  5. Step 5: Solve for x
    x = 145,835,758.85/18,974.84
  6. Step 6: Final answer
    x = 7,685.74

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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.