Home / 8,129.02-12,188.40-3,969.40

Finding the Fourth Proportional to 8,129.02, 12,188.40 and 3,969.40

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Solution

The fourth proportional to 8,129.02, 12,188.40 and 3,969.40 is: 5,951.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.02 : 12,188.40 = 3,969.40 : x
  2. Step 2: Convert to fraction form
    8,129.02/12,188.40 = 3,969.40/x
  3. Step 3: Cross multiply
    8,129.02x = 12,188.40 × 3,969.40
  4. Step 4: Simplify right side
    8,129.02x = 48,380,634.96
  5. Step 5: Solve for x
    x = 48,380,634.96/8,129.02
  6. Step 6: Final answer
    x = 5,951.60

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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.