Home / 11,139.45-15,370.97-6,661.56

Finding the Fourth Proportional to 11,139.45, 15,370.97 and 6,661.56

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Solution

The fourth proportional to 11,139.45, 15,370.97 and 6,661.56 is: 9,192.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.45 : 15,370.97 = 6,661.56 : x
  2. Step 2: Convert to fraction form
    11,139.45/15,370.97 = 6,661.56/x
  3. Step 3: Cross multiply
    11,139.45x = 15,370.97 × 6,661.56
  4. Step 4: Simplify right side
    11,139.45x = 102,394,638.91
  5. Step 5: Solve for x
    x = 102,394,638.91/11,139.45
  6. Step 6: Final answer
    x = 9,192.08

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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.