Home / 3,924.09-5,415.25-2,155.81

Finding the Fourth Proportional to 3,924.09, 5,415.25 and 2,155.81

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Solution

The fourth proportional to 3,924.09, 5,415.25 and 2,155.81 is: 2,975.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924.09 : 5,415.25 = 2,155.81 : x
  2. Step 2: Convert to fraction form
    3,924.09/5,415.25 = 2,155.81/x
  3. Step 3: Cross multiply
    3,924.09x = 5,415.25 × 2,155.81
  4. Step 4: Simplify right side
    3,924.09x = 11,674,269.03
  5. Step 5: Solve for x
    x = 11,674,269.03/3,924.09
  6. Step 6: Final answer
    x = 2,975.02

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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.