Home / 8,118.80-12,181.40-3,187.60

Finding the Fourth Proportional to 8,118.80, 12,181.40 and 3,187.60

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Solution

The fourth proportional to 8,118.80, 12,181.40 and 3,187.60 is: 4,782.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.80 : 12,181.40 = 3,187.60 : x
  2. Step 2: Convert to fraction form
    8,118.80/12,181.40 = 3,187.60/x
  3. Step 3: Cross multiply
    8,118.80x = 12,181.40 × 3,187.60
  4. Step 4: Simplify right side
    8,118.80x = 38,829,430.64
  5. Step 5: Solve for x
    x = 38,829,430.64/8,118.80
  6. Step 6: Final answer
    x = 4,782.66

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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.