Home / 3,890.17-5,368.30-2,211.55

Finding the Fourth Proportional to 3,890.17, 5,368.30 and 2,211.55

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Solution

The fourth proportional to 3,890.17, 5,368.30 and 2,211.55 is: 3,051.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.17 : 5,368.30 = 2,211.55 : x
  2. Step 2: Convert to fraction form
    3,890.17/5,368.30 = 2,211.55/x
  3. Step 3: Cross multiply
    3,890.17x = 5,368.30 × 2,211.55
  4. Step 4: Simplify right side
    3,890.17x = 11,872,244.92
  5. Step 5: Solve for x
    x = 11,872,244.92/3,890.17
  6. Step 6: Final answer
    x = 3,051.86

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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.