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Finding the Fourth Proportional to 18,765.82, 28,152.74 and 6,919.62

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Solution

The fourth proportional to 18,765.82, 28,152.74 and 6,919.62 is: 10,380.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.82 : 28,152.74 = 6,919.62 : x
  2. Step 2: Convert to fraction form
    18,765.82/28,152.74 = 6,919.62/x
  3. Step 3: Cross multiply
    18,765.82x = 28,152.74 × 6,919.62
  4. Step 4: Simplify right side
    18,765.82x = 194,806,228.16
  5. Step 5: Solve for x
    x = 194,806,228.16/18,765.82
  6. Step 6: Final answer
    x = 10,380.91

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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.