Home / 13,189.43-18,201.36-7,139.66

Finding the Fourth Proportional to 13,189.43, 18,201.36 and 7,139.66

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Solution

The fourth proportional to 13,189.43, 18,201.36 and 7,139.66 is: 9,852.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.43 : 18,201.36 = 7,139.66 : x
  2. Step 2: Convert to fraction form
    13,189.43/18,201.36 = 7,139.66/x
  3. Step 3: Cross multiply
    13,189.43x = 18,201.36 × 7,139.66
  4. Step 4: Simplify right side
    13,189.43x = 129,951,521.94
  5. Step 5: Solve for x
    x = 129,951,521.94/13,189.43
  6. Step 6: Final answer
    x = 9,852.70

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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.