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Finding the Fourth Proportional to 19,911.70, 27,477.39 and 10,958.70

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Solution

The fourth proportional to 19,911.70, 27,477.39 and 10,958.70 is: 15,122.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,911.70 : 27,477.39 = 10,958.70 : x
  2. Step 2: Convert to fraction form
    19,911.70/27,477.39 = 10,958.70/x
  3. Step 3: Cross multiply
    19,911.70x = 27,477.39 × 10,958.70
  4. Step 4: Simplify right side
    19,911.70x = 301,116,473.79
  5. Step 5: Solve for x
    x = 301,116,473.79/19,911.70
  6. Step 6: Final answer
    x = 15,122.59

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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.