Home / 8,190.40-12,271.20-6,721.60

Finding the Fourth Proportional to 8,190.40, 12,271.20 and 6,721.60

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Solution

The fourth proportional to 8,190.40, 12,271.20 and 6,721.60 is: 10,070.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,190.40 : 12,271.20 = 6,721.60 : x
  2. Step 2: Convert to fraction form
    8,190.40/12,271.20 = 6,721.60/x
  3. Step 3: Cross multiply
    8,190.40x = 12,271.20 × 6,721.60
  4. Step 4: Simplify right side
    8,190.40x = 82,482,097.92
  5. Step 5: Solve for x
    x = 82,482,097.92/8,190.40
  6. Step 6: Final answer
    x = 10,070.58

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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.