Home / 3,953.61-5,455.98-2,185.20

Finding the Fourth Proportional to 3,953.61, 5,455.98 and 2,185.20

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Solution

The fourth proportional to 3,953.61, 5,455.98 and 2,185.20 is: 3,015.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,953.61 : 5,455.98 = 2,185.20 : x
  2. Step 2: Convert to fraction form
    3,953.61/5,455.98 = 2,185.20/x
  3. Step 3: Cross multiply
    3,953.61x = 5,455.98 × 2,185.20
  4. Step 4: Simplify right side
    3,953.61x = 11,922,407.50
  5. Step 5: Solve for x
    x = 11,922,407.50/3,953.61
  6. Step 6: Final answer
    x = 3,015.58

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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.