Home / 12,399.09-18,599.81-4,079.18

Finding the Fourth Proportional to 12,399.09, 18,599.81 and 4,079.18

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Solution

The fourth proportional to 12,399.09, 18,599.81 and 4,079.18 is: 6,119.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,399.09 : 18,599.81 = 4,079.18 : x
  2. Step 2: Convert to fraction form
    12,399.09/18,599.81 = 4,079.18/x
  3. Step 3: Cross multiply
    12,399.09x = 18,599.81 × 4,079.18
  4. Step 4: Simplify right side
    12,399.09x = 75,871,859.56
  5. Step 5: Solve for x
    x = 75,871,859.56/12,399.09
  6. Step 6: Final answer
    x = 6,119.15

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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.