Home / 3,935.40-5,430.96-2,167.08

Finding the Fourth Proportional to 3,935.40, 5,430.96 and 2,167.08

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Solution

The fourth proportional to 3,935.40, 5,430.96 and 2,167.08 is: 2,990.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.40 : 5,430.96 = 2,167.08 : x
  2. Step 2: Convert to fraction form
    3,935.40/5,430.96 = 2,167.08/x
  3. Step 3: Cross multiply
    3,935.40x = 5,430.96 × 2,167.08
  4. Step 4: Simplify right side
    3,935.40x = 11,769,324.80
  5. Step 5: Solve for x
    x = 11,769,324.80/3,935.40
  6. Step 6: Final answer
    x = 2,990.63

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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.