Home / 3,926.79-5,418.93-2,158.32

Finding the Fourth Proportional to 3,926.79, 5,418.93 and 2,158.32

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Solution

The fourth proportional to 3,926.79, 5,418.93 and 2,158.32 is: 2,978.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,926.79 : 5,418.93 = 2,158.32 : x
  2. Step 2: Convert to fraction form
    3,926.79/5,418.93 = 2,158.32/x
  3. Step 3: Cross multiply
    3,926.79x = 5,418.93 × 2,158.32
  4. Step 4: Simplify right side
    3,926.79x = 11,695,785.00
  5. Step 5: Solve for x
    x = 11,695,785.00/3,926.79
  6. Step 6: Final answer
    x = 2,978.46

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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.