Home / 13,189.41-18,201.39-7,221.47

Finding the Fourth Proportional to 13,189.41, 18,201.39 and 7,221.47

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Solution

The fourth proportional to 13,189.41, 18,201.39 and 7,221.47 is: 9,965.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.41 : 18,201.39 = 7,221.47 : x
  2. Step 2: Convert to fraction form
    13,189.41/18,201.39 = 7,221.47/x
  3. Step 3: Cross multiply
    13,189.41x = 18,201.39 × 7,221.47
  4. Step 4: Simplify right side
    13,189.41x = 131,440,700.84
  5. Step 5: Solve for x
    x = 131,440,700.84/13,189.41
  6. Step 6: Final answer
    x = 9,965.62

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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.