Home / 8,200.45-12,300.85-2,653.79

Finding the Fourth Proportional to 8,200.45, 12,300.85 and 2,653.79

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Solution

The fourth proportional to 8,200.45, 12,300.85 and 2,653.79 is: 3,980.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,200.45 : 12,300.85 = 2,653.79 : x
  2. Step 2: Convert to fraction form
    8,200.45/12,300.85 = 2,653.79/x
  3. Step 3: Cross multiply
    8,200.45x = 12,300.85 × 2,653.79
  4. Step 4: Simplify right side
    8,200.45x = 32,643,845.40
  5. Step 5: Solve for x
    x = 32,643,845.40/8,200.45
  6. Step 6: Final answer
    x = 3,980.74

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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.