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Finding the Fourth Proportional to 19,690.56, 27,171 and 11,190.24

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Solution

The fourth proportional to 19,690.56, 27,171 and 11,190.24 is: 15,441.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,690.56 : 27,171 = 11,190.24 : x
  2. Step 2: Convert to fraction form
    19,690.56/27,171 = 11,190.24/x
  3. Step 3: Cross multiply
    19,690.56x = 27,171 × 11,190.24
  4. Step 4: Simplify right side
    19,690.56x = 304,050,011.04
  5. Step 5: Solve for x
    x = 304,050,011.04/19,690.56
  6. Step 6: Final answer
    x = 15,441.41

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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.