Home / 7,112.80-10,668.36-1,919.08

Finding the Fourth Proportional to 7,112.80, 10,668.36 and 1,919.08

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Solution

The fourth proportional to 7,112.80, 10,668.36 and 1,919.08 is: 2,878.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.80 : 10,668.36 = 1,919.08 : x
  2. Step 2: Convert to fraction form
    7,112.80/10,668.36 = 1,919.08/x
  3. Step 3: Cross multiply
    7,112.80x = 10,668.36 × 1,919.08
  4. Step 4: Simplify right side
    7,112.80x = 20,473,436.31
  5. Step 5: Solve for x
    x = 20,473,436.31/7,112.80
  6. Step 6: Final answer
    x = 2,878.39

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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.