Home / 8,679.12-13,020.30-3,485.40

Finding the Fourth Proportional to 8,679.12, 13,020.30 and 3,485.40

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Solution

The fourth proportional to 8,679.12, 13,020.30 and 3,485.40 is: 5,228.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.12 : 13,020.30 = 3,485.40 : x
  2. Step 2: Convert to fraction form
    8,679.12/13,020.30 = 3,485.40/x
  3. Step 3: Cross multiply
    8,679.12x = 13,020.30 × 3,485.40
  4. Step 4: Simplify right side
    8,679.12x = 45,380,953.62
  5. Step 5: Solve for x
    x = 45,380,953.62/8,679.12
  6. Step 6: Final answer
    x = 5,228.75

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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.