Home / 3,518.70-4,856.67-2,121.90

Finding the Fourth Proportional to 3,518.70, 4,856.67 and 2,121.90

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Solution

The fourth proportional to 3,518.70, 4,856.67 and 2,121.90 is: 2,928.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,518.70 : 4,856.67 = 2,121.90 : x
  2. Step 2: Convert to fraction form
    3,518.70/4,856.67 = 2,121.90/x
  3. Step 3: Cross multiply
    3,518.70x = 4,856.67 × 2,121.90
  4. Step 4: Simplify right side
    3,518.70x = 10,305,368.07
  5. Step 5: Solve for x
    x = 10,305,368.07/3,518.70
  6. Step 6: Final answer
    x = 2,928.74

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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.