Home / 3,870.49-5,341.39-2,102.21

Finding the Fourth Proportional to 3,870.49, 5,341.39 and 2,102.21

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Solution

The fourth proportional to 3,870.49, 5,341.39 and 2,102.21 is: 2,901.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870.49 : 5,341.39 = 2,102.21 : x
  2. Step 2: Convert to fraction form
    3,870.49/5,341.39 = 2,102.21/x
  3. Step 3: Cross multiply
    3,870.49x = 5,341.39 × 2,102.21
  4. Step 4: Simplify right side
    3,870.49x = 11,228,738.39
  5. Step 5: Solve for x
    x = 11,228,738.39/3,870.49
  6. Step 6: Final answer
    x = 2,901.11

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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.