Home / 3,938.32-5,434.87-2,170.05

Finding the Fourth Proportional to 3,938.32, 5,434.87 and 2,170.05

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Solution

The fourth proportional to 3,938.32, 5,434.87 and 2,170.05 is: 2,994.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.32 : 5,434.87 = 2,170.05 : x
  2. Step 2: Convert to fraction form
    3,938.32/5,434.87 = 2,170.05/x
  3. Step 3: Cross multiply
    3,938.32x = 5,434.87 × 2,170.05
  4. Step 4: Simplify right side
    3,938.32x = 11,793,939.64
  5. Step 5: Solve for x
    x = 11,793,939.64/3,938.32
  6. Step 6: Final answer
    x = 2,994.66

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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.