Home / 3,938.63-5,435.32-2,170.19

Finding the Fourth Proportional to 3,938.63, 5,435.32 and 2,170.19

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Solution

The fourth proportional to 3,938.63, 5,435.32 and 2,170.19 is: 2,994.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.63 : 5,435.32 = 2,170.19 : x
  2. Step 2: Convert to fraction form
    3,938.63/5,435.32 = 2,170.19/x
  3. Step 3: Cross multiply
    3,938.63x = 5,435.32 × 2,170.19
  4. Step 4: Simplify right side
    3,938.63x = 11,795,689.34
  5. Step 5: Solve for x
    x = 11,795,689.34/3,938.63
  6. Step 6: Final answer
    x = 2,994.87

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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.