Home / 28,555.80-39,370.38-22,171.56

Finding the Fourth Proportional to 28,555.80, 39,370.38 and 22,171.56

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Solution

The fourth proportional to 28,555.80, 39,370.38 and 22,171.56 is: 30,568.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,555.80 : 39,370.38 = 22,171.56 : x
  2. Step 2: Convert to fraction form
    28,555.80/39,370.38 = 22,171.56/x
  3. Step 3: Cross multiply
    28,555.80x = 39,370.38 × 22,171.56
  4. Step 4: Simplify right side
    28,555.80x = 872,902,742.39
  5. Step 5: Solve for x
    x = 872,902,742.39/28,555.80
  6. Step 6: Final answer
    x = 30,568.32

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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.