Home / 19,581.57-27,019.85-11,515.59

Finding the Fourth Proportional to 19,581.57, 27,019.85 and 11,515.59

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Solution

The fourth proportional to 19,581.57, 27,019.85 and 11,515.59 is: 15,889.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,581.57 : 27,019.85 = 11,515.59 : x
  2. Step 2: Convert to fraction form
    19,581.57/27,019.85 = 11,515.59/x
  3. Step 3: Cross multiply
    19,581.57x = 27,019.85 × 11,515.59
  4. Step 4: Simplify right side
    19,581.57x = 311,149,456.88
  5. Step 5: Solve for x
    x = 311,149,456.88/19,581.57
  6. Step 6: Final answer
    x = 15,889.91

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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.