Home / 13,189.44-18,200.64-7,221.12

Finding the Fourth Proportional to 13,189.44, 18,200.64 and 7,221.12

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Solution

The fourth proportional to 13,189.44, 18,200.64 and 7,221.12 is: 9,964.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.44 : 18,200.64 = 7,221.12 : x
  2. Step 2: Convert to fraction form
    13,189.44/18,200.64 = 7,221.12/x
  3. Step 3: Cross multiply
    13,189.44x = 18,200.64 × 7,221.12
  4. Step 4: Simplify right side
    13,189.44x = 131,429,005.52
  5. Step 5: Solve for x
    x = 131,429,005.52/13,189.44
  6. Step 6: Final answer
    x = 9,964.71

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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.