Home / 6,918.69-10,374.84-1,987.14

Finding the Fourth Proportional to 6,918.69, 10,374.84 and 1,987.14

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Solution

The fourth proportional to 6,918.69, 10,374.84 and 1,987.14 is: 2,979.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,918.69 : 10,374.84 = 1,987.14 : x
  2. Step 2: Convert to fraction form
    6,918.69/10,374.84 = 1,987.14/x
  3. Step 3: Cross multiply
    6,918.69x = 10,374.84 × 1,987.14
  4. Step 4: Simplify right side
    6,918.69x = 20,616,259.56
  5. Step 5: Solve for x
    x = 20,616,259.56/6,918.69
  6. Step 6: Final answer
    x = 2,979.79

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1.5x scale

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.