Home / 11,115.36-15,338.76-6,399.60

Finding the Fourth Proportional to 11,115.36, 15,338.76 and 6,399.60

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Solution

The fourth proportional to 11,115.36, 15,338.76 and 6,399.60 is: 8,831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.36 : 15,338.76 = 6,399.60 : x
  2. Step 2: Convert to fraction form
    11,115.36/15,338.76 = 6,399.60/x
  3. Step 3: Cross multiply
    11,115.36x = 15,338.76 × 6,399.60
  4. Step 4: Simplify right side
    11,115.36x = 98,161,928.50
  5. Step 5: Solve for x
    x = 98,161,928.50/11,115.36
  6. Step 6: Final answer
    x = 8,831.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.