Home / 12,136.20-18,200.96-7,687.19

Finding the Fourth Proportional to 12,136.20, 18,200.96 and 7,687.19

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Solution

The fourth proportional to 12,136.20, 18,200.96 and 7,687.19 is: 11,528.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,136.20 : 18,200.96 = 7,687.19 : x
  2. Step 2: Convert to fraction form
    12,136.20/18,200.96 = 7,687.19/x
  3. Step 3: Cross multiply
    12,136.20x = 18,200.96 × 7,687.19
  4. Step 4: Simplify right side
    12,136.20x = 139,914,237.70
  5. Step 5: Solve for x
    x = 139,914,237.70/12,136.20
  6. Step 6: Final answer
    x = 11,528.67

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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.