Home / 3,868.49-5,338.47-2,100.09

Finding the Fourth Proportional to 3,868.49, 5,338.47 and 2,100.09

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Solution

The fourth proportional to 3,868.49, 5,338.47 and 2,100.09 is: 2,898.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,868.49 : 5,338.47 = 2,100.09 : x
  2. Step 2: Convert to fraction form
    3,868.49/5,338.47 = 2,100.09/x
  3. Step 3: Cross multiply
    3,868.49x = 5,338.47 × 2,100.09
  4. Step 4: Simplify right side
    3,868.49x = 11,211,267.46
  5. Step 5: Solve for x
    x = 11,211,267.46/3,868.49
  6. Step 6: Final answer
    x = 2,898.10

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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.