Home / 3,890.09-5,368.47-2,211.44

Finding the Fourth Proportional to 3,890.09, 5,368.47 and 2,211.44

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Solution

The fourth proportional to 3,890.09, 5,368.47 and 2,211.44 is: 3,051.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.09 : 5,368.47 = 2,211.44 : x
  2. Step 2: Convert to fraction form
    3,890.09/5,368.47 = 2,211.44/x
  3. Step 3: Cross multiply
    3,890.09x = 5,368.47 × 2,211.44
  4. Step 4: Simplify right side
    3,890.09x = 11,872,038.24
  5. Step 5: Solve for x
    x = 11,872,038.24/3,890.09
  6. Step 6: Final answer
    x = 3,051.87

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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.