Home / 3,890.69-5,368.93-2,211.86

Finding the Fourth Proportional to 3,890.69, 5,368.93 and 2,211.86

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Solution

The fourth proportional to 3,890.69, 5,368.93 and 2,211.86 is: 3,052.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.69 : 5,368.93 = 2,211.86 : x
  2. Step 2: Convert to fraction form
    3,890.69/5,368.93 = 2,211.86/x
  3. Step 3: Cross multiply
    3,890.69x = 5,368.93 × 2,211.86
  4. Step 4: Simplify right side
    3,890.69x = 11,875,329.40
  5. Step 5: Solve for x
    x = 11,875,329.40/3,890.69
  6. Step 6: Final answer
    x = 3,052.25

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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.