Home / 3,921.63-5,416.25-2,660.51

Finding the Fourth Proportional to 3,921.63, 5,416.25 and 2,660.51

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Solution

The fourth proportional to 3,921.63, 5,416.25 and 2,660.51 is: 3,674.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.63 : 5,416.25 = 2,660.51 : x
  2. Step 2: Convert to fraction form
    3,921.63/5,416.25 = 2,660.51/x
  3. Step 3: Cross multiply
    3,921.63x = 5,416.25 × 2,660.51
  4. Step 4: Simplify right side
    3,921.63x = 14,409,946.90
  5. Step 5: Solve for x
    x = 14,409,946.90/3,921.63
  6. Step 6: Final answer
    x = 3,674.48

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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.