Home / 3,118.40-4,303.87-1,939.85

Finding the Fourth Proportional to 3,118.40, 4,303.87 and 1,939.85

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Solution

The fourth proportional to 3,118.40, 4,303.87 and 1,939.85 is: 2,677.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.40 : 4,303.87 = 1,939.85 : x
  2. Step 2: Convert to fraction form
    3,118.40/4,303.87 = 1,939.85/x
  3. Step 3: Cross multiply
    3,118.40x = 4,303.87 × 1,939.85
  4. Step 4: Simplify right side
    3,118.40x = 8,348,852.52
  5. Step 5: Solve for x
    x = 8,348,852.52/3,118.40
  6. Step 6: Final answer
    x = 2,677.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.