Home / 3,930.51-5,415.81-3,612.18

Finding the Fourth Proportional to 3,930.51, 5,415.81 and 3,612.18

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Solution

The fourth proportional to 3,930.51, 5,415.81 and 3,612.18 is: 4,977.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.51 : 5,415.81 = 3,612.18 : x
  2. Step 2: Convert to fraction form
    3,930.51/5,415.81 = 3,612.18/x
  3. Step 3: Cross multiply
    3,930.51x = 5,415.81 × 3,612.18
  4. Step 4: Simplify right side
    3,930.51x = 19,562,880.57
  5. Step 5: Solve for x
    x = 19,562,880.57/3,930.51
  6. Step 6: Final answer
    x = 4,977.19

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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.