Home / 3,890.01-5,368.19-2,121.58

Finding the Fourth Proportional to 3,890.01, 5,368.19 and 2,121.58

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Solution

The fourth proportional to 3,890.01, 5,368.19 and 2,121.58 is: 2,927.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.01 : 5,368.19 = 2,121.58 : x
  2. Step 2: Convert to fraction form
    3,890.01/5,368.19 = 2,121.58/x
  3. Step 3: Cross multiply
    3,890.01x = 5,368.19 × 2,121.58
  4. Step 4: Simplify right side
    3,890.01x = 11,389,044.54
  5. Step 5: Solve for x
    x = 11,389,044.54/3,890.01
  6. Step 6: Final answer
    x = 2,927.77

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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.