Home / 3,890.61-5,368.86-2,211.98

Finding the Fourth Proportional to 3,890.61, 5,368.86 and 2,211.98

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Solution

The fourth proportional to 3,890.61, 5,368.86 and 2,211.98 is: 3,052.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.61 : 5,368.86 = 2,211.98 : x
  2. Step 2: Convert to fraction form
    3,890.61/5,368.86 = 2,211.98/x
  3. Step 3: Cross multiply
    3,890.61x = 5,368.86 × 2,211.98
  4. Step 4: Simplify right side
    3,890.61x = 11,875,784.10
  5. Step 5: Solve for x
    x = 11,875,784.10/3,890.61
  6. Step 6: Final answer
    x = 3,052.42

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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.