Home / 3,935.50-5,430.78-2,167.07

Finding the Fourth Proportional to 3,935.50, 5,430.78 and 2,167.07

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Solution

The fourth proportional to 3,935.50, 5,430.78 and 2,167.07 is: 2,990.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.50 : 5,430.78 = 2,167.07 : x
  2. Step 2: Convert to fraction form
    3,935.50/5,430.78 = 2,167.07/x
  3. Step 3: Cross multiply
    3,935.50x = 5,430.78 × 2,167.07
  4. Step 4: Simplify right side
    3,935.50x = 11,768,853.26
  5. Step 5: Solve for x
    x = 11,768,853.26/3,935.50
  6. Step 6: Final answer
    x = 2,990.44

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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.