Home / 3,924.40-5,415.69-2,156.02

Finding the Fourth Proportional to 3,924.40, 5,415.69 and 2,156.02

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Solution

The fourth proportional to 3,924.40, 5,415.69 and 2,156.02 is: 2,975.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924.40 : 5,415.69 = 2,156.02 : x
  2. Step 2: Convert to fraction form
    3,924.40/5,415.69 = 2,156.02/x
  3. Step 3: Cross multiply
    3,924.40x = 5,415.69 × 2,156.02
  4. Step 4: Simplify right side
    3,924.40x = 11,676,335.95
  5. Step 5: Solve for x
    x = 11,676,335.95/3,924.40
  6. Step 6: Final answer
    x = 2,975.32

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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.