Home / 8,280.20-12,420.30-7,646.60

Finding the Fourth Proportional to 8,280.20, 12,420.30 and 7,646.60

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Solution

The fourth proportional to 8,280.20, 12,420.30 and 7,646.60 is: 11,469.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,280.20 : 12,420.30 = 7,646.60 : x
  2. Step 2: Convert to fraction form
    8,280.20/12,420.30 = 7,646.60/x
  3. Step 3: Cross multiply
    8,280.20x = 12,420.30 × 7,646.60
  4. Step 4: Simplify right side
    8,280.20x = 94,973,065.98
  5. Step 5: Solve for x
    x = 94,973,065.98/8,280.20
  6. Step 6: Final answer
    x = 11,469.90

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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.