Home / 13,788.51-20,680.80-4,427.31

Finding the Fourth Proportional to 13,788.51, 20,680.80 and 4,427.31

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Solution

The fourth proportional to 13,788.51, 20,680.80 and 4,427.31 is: 6,640.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,788.51 : 20,680.80 = 4,427.31 : x
  2. Step 2: Convert to fraction form
    13,788.51/20,680.80 = 4,427.31/x
  3. Step 3: Cross multiply
    13,788.51x = 20,680.80 × 4,427.31
  4. Step 4: Simplify right side
    13,788.51x = 91,560,312.65
  5. Step 5: Solve for x
    x = 91,560,312.65/13,788.51
  6. Step 6: Final answer
    x = 6,640.33

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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.