Home / 13,776.72-19,012.38-7,489.56

Finding the Fourth Proportional to 13,776.72, 19,012.38 and 7,489.56

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Solution

The fourth proportional to 13,776.72, 19,012.38 and 7,489.56 is: 10,335.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,776.72 : 19,012.38 = 7,489.56 : x
  2. Step 2: Convert to fraction form
    13,776.72/19,012.38 = 7,489.56/x
  3. Step 3: Cross multiply
    13,776.72x = 19,012.38 × 7,489.56
  4. Step 4: Simplify right side
    13,776.72x = 142,394,360.75
  5. Step 5: Solve for x
    x = 142,394,360.75/13,776.72
  6. Step 6: Final answer
    x = 10,335.87

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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.