Home / 20,872.78-28,804.27-11,441.32

Finding the Fourth Proportional to 20,872.78, 28,804.27 and 11,441.32

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Solution

The fourth proportional to 20,872.78, 28,804.27 and 11,441.32 is: 15,788.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.78 : 28,804.27 = 11,441.32 : x
  2. Step 2: Convert to fraction form
    20,872.78/28,804.27 = 11,441.32/x
  3. Step 3: Cross multiply
    20,872.78x = 28,804.27 × 11,441.32
  4. Step 4: Simplify right side
    20,872.78x = 329,558,870.44
  5. Step 5: Solve for x
    x = 329,558,870.44/20,872.78
  6. Step 6: Final answer
    x = 15,788.93

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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.