Home / 13,719.32-20,578.80-3,858.08

Finding the Fourth Proportional to 13,719.32, 20,578.80 and 3,858.08

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Solution

The fourth proportional to 13,719.32, 20,578.80 and 3,858.08 is: 5,787.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.32 : 20,578.80 = 3,858.08 : x
  2. Step 2: Convert to fraction form
    13,719.32/20,578.80 = 3,858.08/x
  3. Step 3: Cross multiply
    13,719.32x = 20,578.80 × 3,858.08
  4. Step 4: Simplify right side
    13,719.32x = 79,394,656.70
  5. Step 5: Solve for x
    x = 79,394,656.70/13,719.32
  6. Step 6: Final answer
    x = 5,787.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.