Home / 3,120.66-4,678.45-2,130.98

Finding the Fourth Proportional to 3,120.66, 4,678.45 and 2,130.98

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Solution

The fourth proportional to 3,120.66, 4,678.45 and 2,130.98 is: 3,194.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.66 : 4,678.45 = 2,130.98 : x
  2. Step 2: Convert to fraction form
    3,120.66/4,678.45 = 2,130.98/x
  3. Step 3: Cross multiply
    3,120.66x = 4,678.45 × 2,130.98
  4. Step 4: Simplify right side
    3,120.66x = 9,969,671.68
  5. Step 5: Solve for x
    x = 9,969,671.68/3,120.66
  6. Step 6: Final answer
    x = 3,194.73

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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.