Home / 13,189.69-18,201.78-7,221.36

Finding the Fourth Proportional to 13,189.69, 18,201.78 and 7,221.36

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Solution

The fourth proportional to 13,189.69, 18,201.78 and 7,221.36 is: 9,965.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.69 : 18,201.78 = 7,221.36 : x
  2. Step 2: Convert to fraction form
    13,189.69/18,201.78 = 7,221.36/x
  3. Step 3: Cross multiply
    13,189.69x = 18,201.78 × 7,221.36
  4. Step 4: Simplify right side
    13,189.69x = 131,441,606.02
  5. Step 5: Solve for x
    x = 131,441,606.02/13,189.69
  6. Step 6: Final answer
    x = 9,965.48

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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.