Home / 13,879.31-19,148.84-7,828.80

Finding the Fourth Proportional to 13,879.31, 19,148.84 and 7,828.80

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Solution

The fourth proportional to 13,879.31, 19,148.84 and 7,828.80 is: 10,801.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,879.31 : 19,148.84 = 7,828.80 : x
  2. Step 2: Convert to fraction form
    13,879.31/19,148.84 = 7,828.80/x
  3. Step 3: Cross multiply
    13,879.31x = 19,148.84 × 7,828.80
  4. Step 4: Simplify right side
    13,879.31x = 149,912,399.45
  5. Step 5: Solve for x
    x = 149,912,399.45/13,879.31
  6. Step 6: Final answer
    x = 10,801.15

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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.