Home / 15,334.50-21,161.61-8,620.05

Finding the Fourth Proportional to 15,334.50, 21,161.61 and 8,620.05

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Solution

The fourth proportional to 15,334.50, 21,161.61 and 8,620.05 is: 11,895.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,334.50 : 21,161.61 = 8,620.05 : x
  2. Step 2: Convert to fraction form
    15,334.50/21,161.61 = 8,620.05/x
  3. Step 3: Cross multiply
    15,334.50x = 21,161.61 × 8,620.05
  4. Step 4: Simplify right side
    15,334.50x = 182,414,136.28
  5. Step 5: Solve for x
    x = 182,414,136.28/15,334.50
  6. Step 6: Final answer
    x = 11,895.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.