Home / 12,399.42-18,583.30-5,811.09

Finding the Fourth Proportional to 12,399.42, 18,583.30 and 5,811.09

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Solution

The fourth proportional to 12,399.42, 18,583.30 and 5,811.09 is: 8,709.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,399.42 : 18,583.30 = 5,811.09 : x
  2. Step 2: Convert to fraction form
    12,399.42/18,583.30 = 5,811.09/x
  3. Step 3: Cross multiply
    12,399.42x = 18,583.30 × 5,811.09
  4. Step 4: Simplify right side
    12,399.42x = 107,989,228.80
  5. Step 5: Solve for x
    x = 107,989,228.80/12,399.42
  6. Step 6: Final answer
    x = 8,709.22

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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.