Home / 20,860.69-28,787.73-11,429.26

Finding the Fourth Proportional to 20,860.69, 28,787.73 and 11,429.26

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Solution

The fourth proportional to 20,860.69, 28,787.73 and 11,429.26 is: 15,772.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.69 : 28,787.73 = 11,429.26 : x
  2. Step 2: Convert to fraction form
    20,860.69/28,787.73 = 11,429.26/x
  3. Step 3: Cross multiply
    20,860.69x = 28,787.73 × 11,429.26
  4. Step 4: Simplify right side
    20,860.69x = 329,022,450.98
  5. Step 5: Solve for x
    x = 329,022,450.98/20,860.69
  6. Step 6: Final answer
    x = 15,772.37

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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.