Home / 13,499.43-20,231.20-7,172.99

Finding the Fourth Proportional to 13,499.43, 20,231.20 and 7,172.99

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Solution

The fourth proportional to 13,499.43, 20,231.20 and 7,172.99 is: 10,749.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,499.43 : 20,231.20 = 7,172.99 : x
  2. Step 2: Convert to fraction form
    13,499.43/20,231.20 = 7,172.99/x
  3. Step 3: Cross multiply
    13,499.43x = 20,231.20 × 7,172.99
  4. Step 4: Simplify right side
    13,499.43x = 145,118,178.97
  5. Step 5: Solve for x
    x = 145,118,178.97/13,499.43
  6. Step 6: Final answer
    x = 10,749.95

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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.