Home / 3,211.60-4,426.88-2,621.12

Finding the Fourth Proportional to 3,211.60, 4,426.88 and 2,621.12

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Solution

The fourth proportional to 3,211.60, 4,426.88 and 2,621.12 is: 3,612.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.60 : 4,426.88 = 2,621.12 : x
  2. Step 2: Convert to fraction form
    3,211.60/4,426.88 = 2,621.12/x
  3. Step 3: Cross multiply
    3,211.60x = 4,426.88 × 2,621.12
  4. Step 4: Simplify right side
    3,211.60x = 11,603,383.71
  5. Step 5: Solve for x
    x = 11,603,383.71/3,211.60
  6. Step 6: Final answer
    x = 3,612.96

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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.