Home / 3,935.08-5,430.21-2,166.35

Finding the Fourth Proportional to 3,935.08, 5,430.21 and 2,166.35

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Solution

The fourth proportional to 3,935.08, 5,430.21 and 2,166.35 is: 2,989.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.08 : 5,430.21 = 2,166.35 : x
  2. Step 2: Convert to fraction form
    3,935.08/5,430.21 = 2,166.35/x
  3. Step 3: Cross multiply
    3,935.08x = 5,430.21 × 2,166.35
  4. Step 4: Simplify right side
    3,935.08x = 11,763,735.43
  5. Step 5: Solve for x
    x = 11,763,735.43/3,935.08
  6. Step 6: Final answer
    x = 2,989.45

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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.