Home / 3,129.60-4,692.68-2,143.55

Finding the Fourth Proportional to 3,129.60, 4,692.68 and 2,143.55

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Solution

The fourth proportional to 3,129.60, 4,692.68 and 2,143.55 is: 3,214.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.60 : 4,692.68 = 2,143.55 : x
  2. Step 2: Convert to fraction form
    3,129.60/4,692.68 = 2,143.55/x
  3. Step 3: Cross multiply
    3,129.60x = 4,692.68 × 2,143.55
  4. Step 4: Simplify right side
    3,129.60x = 10,058,960.03
  5. Step 5: Solve for x
    x = 10,058,960.03/3,129.60
  6. Step 6: Final answer
    x = 3,214.14

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1.5x scale

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.