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Finding the Fourth Proportional to 19,919.82, 27,489.54 and 10,967.51

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Solution

The fourth proportional to 19,919.82, 27,489.54 and 10,967.51 is: 15,135.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,919.82 : 27,489.54 = 10,967.51 : x
  2. Step 2: Convert to fraction form
    19,919.82/27,489.54 = 10,967.51/x
  3. Step 3: Cross multiply
    19,919.82x = 27,489.54 × 10,967.51
  4. Step 4: Simplify right side
    19,919.82x = 301,491,667.40
  5. Step 5: Solve for x
    x = 301,491,667.40/19,919.82
  6. Step 6: Final answer
    x = 15,135.26

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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.