Home / 3,953.45-5,455.69-2,185.07

Finding the Fourth Proportional to 3,953.45, 5,455.69 and 2,185.07

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Solution

The fourth proportional to 3,953.45, 5,455.69 and 2,185.07 is: 3,015.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,953.45 : 5,455.69 = 2,185.07 : x
  2. Step 2: Convert to fraction form
    3,953.45/5,455.69 = 2,185.07/x
  3. Step 3: Cross multiply
    3,953.45x = 5,455.69 × 2,185.07
  4. Step 4: Simplify right side
    3,953.45x = 11,921,031.81
  5. Step 5: Solve for x
    x = 11,921,031.81/3,953.45
  6. Step 6: Final answer
    x = 3,015.35

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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.