Home / 8,543.21-12,815.20-2,619.67

Finding the Fourth Proportional to 8,543.21, 12,815.20 and 2,619.67

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Solution

The fourth proportional to 8,543.21, 12,815.20 and 2,619.67 is: 3,929.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,543.21 : 12,815.20 = 2,619.67 : x
  2. Step 2: Convert to fraction form
    8,543.21/12,815.20 = 2,619.67/x
  3. Step 3: Cross multiply
    8,543.21x = 12,815.20 × 2,619.67
  4. Step 4: Simplify right side
    8,543.21x = 33,571,537.46
  5. Step 5: Solve for x
    x = 33,571,537.46/8,543.21
  6. Step 6: Final answer
    x = 3,929.62

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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.