Home / 3,123.60-4,312.68-2,790.96

Finding the Fourth Proportional to 3,123.60, 4,312.68 and 2,790.96

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Solution

The fourth proportional to 3,123.60, 4,312.68 and 2,790.96 is: 3,853.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.60 : 4,312.68 = 2,790.96 : x
  2. Step 2: Convert to fraction form
    3,123.60/4,312.68 = 2,790.96/x
  3. Step 3: Cross multiply
    3,123.60x = 4,312.68 × 2,790.96
  4. Step 4: Simplify right side
    3,123.60x = 12,036,517.37
  5. Step 5: Solve for x
    x = 12,036,517.37/3,123.60
  6. Step 6: Final answer
    x = 3,853.41

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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.