Home / 3,079.87-4,247.95-2,123.09

Finding the Fourth Proportional to 3,079.87, 4,247.95 and 2,123.09

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Solution

The fourth proportional to 3,079.87, 4,247.95 and 2,123.09 is: 2,928.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,079.87 : 4,247.95 = 2,123.09 : x
  2. Step 2: Convert to fraction form
    3,079.87/4,247.95 = 2,123.09/x
  3. Step 3: Cross multiply
    3,079.87x = 4,247.95 × 2,123.09
  4. Step 4: Simplify right side
    3,079.87x = 9,018,769.55
  5. Step 5: Solve for x
    x = 9,018,769.55/3,079.87
  6. Step 6: Final answer
    x = 2,928.29

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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.