Home / 8,135.16-12,203.36-3,978.64

Finding the Fourth Proportional to 8,135.16, 12,203.36 and 3,978.64

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Solution

The fourth proportional to 8,135.16, 12,203.36 and 3,978.64 is: 5,968.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,135.16 : 12,203.36 = 3,978.64 : x
  2. Step 2: Convert to fraction form
    8,135.16/12,203.36 = 3,978.64/x
  3. Step 3: Cross multiply
    8,135.16x = 12,203.36 × 3,978.64
  4. Step 4: Simplify right side
    8,135.16x = 48,552,776.23
  5. Step 5: Solve for x
    x = 48,552,776.23/8,135.16
  6. Step 6: Final answer
    x = 5,968.26

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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.