Home / 8,140.37-12,209.92-3,210.05

Finding the Fourth Proportional to 8,140.37, 12,209.92 and 3,210.05

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Solution

The fourth proportional to 8,140.37, 12,209.92 and 3,210.05 is: 4,814.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,140.37 : 12,209.92 = 3,210.05 : x
  2. Step 2: Convert to fraction form
    8,140.37/12,209.92 = 3,210.05/x
  3. Step 3: Cross multiply
    8,140.37x = 12,209.92 × 3,210.05
  4. Step 4: Simplify right side
    8,140.37x = 39,194,476.20
  5. Step 5: Solve for x
    x = 39,194,476.20/8,140.37
  6. Step 6: Final answer
    x = 4,814.83

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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.