Home / 11,131.28-15,361.18-6,415.44

Finding the Fourth Proportional to 11,131.28, 15,361.18 and 6,415.44

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Solution

The fourth proportional to 11,131.28, 15,361.18 and 6,415.44 is: 8,853.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,131.28 : 15,361.18 = 6,415.44 : x
  2. Step 2: Convert to fraction form
    11,131.28/15,361.18 = 6,415.44/x
  3. Step 3: Cross multiply
    11,131.28x = 15,361.18 × 6,415.44
  4. Step 4: Simplify right side
    11,131.28x = 98,548,728.62
  5. Step 5: Solve for x
    x = 98,548,728.62/11,131.28
  6. Step 6: Final answer
    x = 8,853.32

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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.