Home / 5,390.81-7,436.86-3,896.36

Finding the Fourth Proportional to 5,390.81, 7,436.86 and 3,896.36

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Solution

The fourth proportional to 5,390.81, 7,436.86 and 3,896.36 is: 5,375.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.81 : 7,436.86 = 3,896.36 : x
  2. Step 2: Convert to fraction form
    5,390.81/7,436.86 = 3,896.36/x
  3. Step 3: Cross multiply
    5,390.81x = 7,436.86 × 3,896.36
  4. Step 4: Simplify right side
    5,390.81x = 28,976,683.83
  5. Step 5: Solve for x
    x = 28,976,683.83/5,390.81
  6. Step 6: Final answer
    x = 5,375.20

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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.