Home / 6,918.36-10,379.29-1,987.89

Finding the Fourth Proportional to 6,918.36, 10,379.29 and 1,987.89

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Solution

The fourth proportional to 6,918.36, 10,379.29 and 1,987.89 is: 2,982.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,918.36 : 10,379.29 = 1,987.89 : x
  2. Step 2: Convert to fraction form
    6,918.36/10,379.29 = 1,987.89/x
  3. Step 3: Cross multiply
    6,918.36x = 10,379.29 × 1,987.89
  4. Step 4: Simplify right side
    6,918.36x = 20,632,905.02
  5. Step 5: Solve for x
    x = 20,632,905.02/6,918.36
  6. Step 6: Final answer
    x = 2,982.34

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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.