Home / 3,938.01-5,434.09-2,169.51

Finding the Fourth Proportional to 3,938.01, 5,434.09 and 2,169.51

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Solution

The fourth proportional to 3,938.01, 5,434.09 and 2,169.51 is: 2,993.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.01 : 5,434.09 = 2,169.51 : x
  2. Step 2: Convert to fraction form
    3,938.01/5,434.09 = 2,169.51/x
  3. Step 3: Cross multiply
    3,938.01x = 5,434.09 × 2,169.51
  4. Step 4: Simplify right side
    3,938.01x = 11,789,312.60
  5. Step 5: Solve for x
    x = 11,789,312.60/3,938.01
  6. Step 6: Final answer
    x = 2,993.72

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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.