Home / 8,438.85-12,660.84-5,978.43

Finding the Fourth Proportional to 8,438.85, 12,660.84 and 5,978.43

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Solution

The fourth proportional to 8,438.85, 12,660.84 and 5,978.43 is: 8,969.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.85 : 12,660.84 = 5,978.43 : x
  2. Step 2: Convert to fraction form
    8,438.85/12,660.84 = 5,978.43/x
  3. Step 3: Cross multiply
    8,438.85x = 12,660.84 × 5,978.43
  4. Step 4: Simplify right side
    8,438.85x = 75,691,945.68
  5. Step 5: Solve for x
    x = 75,691,945.68/8,438.85
  6. Step 6: Final answer
    x = 8,969.46

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1.5x scale

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.