Home / 13,455.36-20,184.96-5,138.88

Finding the Fourth Proportional to 13,455.36, 20,184.96 and 5,138.88

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Solution

The fourth proportional to 13,455.36, 20,184.96 and 5,138.88 is: 7,709.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455.36 : 20,184.96 = 5,138.88 : x
  2. Step 2: Convert to fraction form
    13,455.36/20,184.96 = 5,138.88/x
  3. Step 3: Cross multiply
    13,455.36x = 20,184.96 × 5,138.88
  4. Step 4: Simplify right side
    13,455.36x = 103,728,087.24
  5. Step 5: Solve for x
    x = 103,728,087.24/13,455.36
  6. Step 6: Final answer
    x = 7,709.05

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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.