Home / 13,200.96-18,216.24-7,231.36

Finding the Fourth Proportional to 13,200.96, 18,216.24 and 7,231.36

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Solution

The fourth proportional to 13,200.96, 18,216.24 and 7,231.36 is: 9,978.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,200.96 : 18,216.24 = 7,231.36 : x
  2. Step 2: Convert to fraction form
    13,200.96/18,216.24 = 7,231.36/x
  3. Step 3: Cross multiply
    13,200.96x = 18,216.24 × 7,231.36
  4. Step 4: Simplify right side
    13,200.96x = 131,728,189.29
  5. Step 5: Solve for x
    x = 131,728,189.29/13,200.96
  6. Step 6: Final answer
    x = 9,978.68

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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.