Home / 3,890.19-5,391.17-3,816.35

Finding the Fourth Proportional to 3,890.19, 5,391.17 and 3,816.35

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Solution

The fourth proportional to 3,890.19, 5,391.17 and 3,816.35 is: 5,288.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.19 : 5,391.17 = 3,816.35 : x
  2. Step 2: Convert to fraction form
    3,890.19/5,391.17 = 3,816.35/x
  3. Step 3: Cross multiply
    3,890.19x = 5,391.17 × 3,816.35
  4. Step 4: Simplify right side
    3,890.19x = 20,574,591.63
  5. Step 5: Solve for x
    x = 20,574,591.63/3,890.19
  6. Step 6: Final answer
    x = 5,288.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.