Home / 5,978.78-8,254.40-3,855.06

Finding the Fourth Proportional to 5,978.78, 8,254.40 and 3,855.06

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Solution

The fourth proportional to 5,978.78, 8,254.40 and 3,855.06 is: 5,322.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,978.78 : 8,254.40 = 3,855.06 : x
  2. Step 2: Convert to fraction form
    5,978.78/8,254.40 = 3,855.06/x
  3. Step 3: Cross multiply
    5,978.78x = 8,254.40 × 3,855.06
  4. Step 4: Simplify right side
    5,978.78x = 31,821,207.26
  5. Step 5: Solve for x
    x = 31,821,207.26/5,978.78
  6. Step 6: Final answer
    x = 5,322.36

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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.