Home / 3,128.35-4,692.75-2,970.70

Finding the Fourth Proportional to 3,128.35, 4,692.75 and 2,970.70

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Solution

The fourth proportional to 3,128.35, 4,692.75 and 2,970.70 is: 4,456.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.35 : 4,692.75 = 2,970.70 : x
  2. Step 2: Convert to fraction form
    3,128.35/4,692.75 = 2,970.70/x
  3. Step 3: Cross multiply
    3,128.35x = 4,692.75 × 2,970.70
  4. Step 4: Simplify right side
    3,128.35x = 13,940,728.96
  5. Step 5: Solve for x
    x = 13,940,728.96/3,128.35
  6. Step 6: Final answer
    x = 4,456.26

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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.