Home / 13,979.25-19,291.37-8,390.25

Finding the Fourth Proportional to 13,979.25, 19,291.37 and 8,390.25

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Solution

The fourth proportional to 13,979.25, 19,291.37 and 8,390.25 is: 11,578.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.25 : 19,291.37 = 8,390.25 : x
  2. Step 2: Convert to fraction form
    13,979.25/19,291.37 = 8,390.25/x
  3. Step 3: Cross multiply
    13,979.25x = 19,291.37 × 8,390.25
  4. Step 4: Simplify right side
    13,979.25x = 161,859,375.19
  5. Step 5: Solve for x
    x = 161,859,375.19/13,979.25
  6. Step 6: Final answer
    x = 11,578.55

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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.