Home / 12,079.60-18,119.40-9,163.60

Finding the Fourth Proportional to 12,079.60, 18,119.40 and 9,163.60

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Solution

The fourth proportional to 12,079.60, 18,119.40 and 9,163.60 is: 13,745.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,079.60 : 18,119.40 = 9,163.60 : x
  2. Step 2: Convert to fraction form
    12,079.60/18,119.40 = 9,163.60/x
  3. Step 3: Cross multiply
    12,079.60x = 18,119.40 × 9,163.60
  4. Step 4: Simplify right side
    12,079.60x = 166,038,933.84
  5. Step 5: Solve for x
    x = 166,038,933.84/12,079.60
  6. Step 6: Final answer
    x = 13,745.40

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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.