Home / 11,986.08-18,015-9,919.36

Finding the Fourth Proportional to 11,986.08, 18,015 and 9,919.36

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Solution

The fourth proportional to 11,986.08, 18,015 and 9,919.36 is: 14,908.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,986.08 : 18,015 = 9,919.36 : x
  2. Step 2: Convert to fraction form
    11,986.08/18,015 = 9,919.36/x
  3. Step 3: Cross multiply
    11,986.08x = 18,015 × 9,919.36
  4. Step 4: Simplify right side
    11,986.08x = 178,697,270.40
  5. Step 5: Solve for x
    x = 178,697,270.40/11,986.08
  6. Step 6: Final answer
    x = 14,908.73

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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.