Home / 28,427.22-39,208.41-20,871.18

Finding the Fourth Proportional to 28,427.22, 39,208.41 and 20,871.18

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Solution

The fourth proportional to 28,427.22, 39,208.41 and 20,871.18 is: 28,786.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,427.22 : 39,208.41 = 20,871.18 : x
  2. Step 2: Convert to fraction form
    28,427.22/39,208.41 = 20,871.18/x
  3. Step 3: Cross multiply
    28,427.22x = 39,208.41 × 20,871.18
  4. Step 4: Simplify right side
    28,427.22x = 818,325,782.62
  5. Step 5: Solve for x
    x = 818,325,782.62/28,427.22
  6. Step 6: Final answer
    x = 28,786.70

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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.