Home / 20,956.19-28,918.39-11,396.07

Finding the Fourth Proportional to 20,956.19, 28,918.39 and 11,396.07

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Solution

The fourth proportional to 20,956.19, 28,918.39 and 11,396.07 is: 15,725.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.19 : 28,918.39 = 11,396.07 : x
  2. Step 2: Convert to fraction form
    20,956.19/28,918.39 = 11,396.07/x
  3. Step 3: Cross multiply
    20,956.19x = 28,918.39 × 11,396.07
  4. Step 4: Simplify right side
    20,956.19x = 329,556,123.32
  5. Step 5: Solve for x
    x = 329,556,123.32/20,956.19
  6. Step 6: Final answer
    x = 15,725.95

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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.