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Finding the Fourth Proportional to 12,145.70, 18,219 and 4,246.67

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Solution

The fourth proportional to 12,145.70, 18,219 and 4,246.67 is: 6,370.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.70 : 18,219 = 4,246.67 : x
  2. Step 2: Convert to fraction form
    12,145.70/18,219 = 4,246.67/x
  3. Step 3: Cross multiply
    12,145.70x = 18,219 × 4,246.67
  4. Step 4: Simplify right side
    12,145.70x = 77,370,080.73
  5. Step 5: Solve for x
    x = 77,370,080.73/12,145.70
  6. Step 6: Final answer
    x = 6,370.16

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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.