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Finding the Fourth Proportional to 19,917.80, 27,486.81 and 10,965.92

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Solution

The fourth proportional to 19,917.80, 27,486.81 and 10,965.92 is: 15,133.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,917.80 : 27,486.81 = 10,965.92 : x
  2. Step 2: Convert to fraction form
    19,917.80/27,486.81 = 10,965.92/x
  3. Step 3: Cross multiply
    19,917.80x = 27,486.81 × 10,965.92
  4. Step 4: Simplify right side
    19,917.80x = 301,418,022.08
  5. Step 5: Solve for x
    x = 301,418,022.08/19,917.80
  6. Step 6: Final answer
    x = 15,133.10

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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.