Home / 4,079.40-5,628.80-3,871.79

Finding the Fourth Proportional to 4,079.40, 5,628.80 and 3,871.79

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Solution

The fourth proportional to 4,079.40, 5,628.80 and 3,871.79 is: 5,342.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,079.40 : 5,628.80 = 3,871.79 : x
  2. Step 2: Convert to fraction form
    4,079.40/5,628.80 = 3,871.79/x
  3. Step 3: Cross multiply
    4,079.40x = 5,628.80 × 3,871.79
  4. Step 4: Simplify right side
    4,079.40x = 21,793,531.55
  5. Step 5: Solve for x
    x = 21,793,531.55/4,079.40
  6. Step 6: Final answer
    x = 5,342.34

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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.