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Finding the Fourth Proportional to 18,456.87, 27,690.03 and 5,310.21

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Solution

The fourth proportional to 18,456.87, 27,690.03 and 5,310.21 is: 7,966.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,456.87 : 27,690.03 = 5,310.21 : x
  2. Step 2: Convert to fraction form
    18,456.87/27,690.03 = 5,310.21/x
  3. Step 3: Cross multiply
    18,456.87x = 27,690.03 × 5,310.21
  4. Step 4: Simplify right side
    18,456.87x = 147,039,874.21
  5. Step 5: Solve for x
    x = 147,039,874.21/18,456.87
  6. Step 6: Final answer
    x = 7,966.67

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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.