Home / 8,188.40-12,279.60-2,643.20

Finding the Fourth Proportional to 8,188.40, 12,279.60 and 2,643.20

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Solution

The fourth proportional to 8,188.40, 12,279.60 and 2,643.20 is: 3,963.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,188.40 : 12,279.60 = 2,643.20 : x
  2. Step 2: Convert to fraction form
    8,188.40/12,279.60 = 2,643.20/x
  3. Step 3: Cross multiply
    8,188.40x = 12,279.60 × 2,643.20
  4. Step 4: Simplify right side
    8,188.40x = 32,457,438.72
  5. Step 5: Solve for x
    x = 32,457,438.72/8,188.40
  6. Step 6: Final answer
    x = 3,963.83

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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.