Home / 3,128.33-4,318.98-2,185.76

Finding the Fourth Proportional to 3,128.33, 4,318.98 and 2,185.76

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Solution

The fourth proportional to 3,128.33, 4,318.98 and 2,185.76 is: 3,017.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.33 : 4,318.98 = 2,185.76 : x
  2. Step 2: Convert to fraction form
    3,128.33/4,318.98 = 2,185.76/x
  3. Step 3: Cross multiply
    3,128.33x = 4,318.98 × 2,185.76
  4. Step 4: Simplify right side
    3,128.33x = 9,440,253.72
  5. Step 5: Solve for x
    x = 9,440,253.72/3,128.33
  6. Step 6: Final answer
    x = 3,017.67

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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.