Home / 28,205.89-42,225.81-20,843.19

Finding the Fourth Proportional to 28,205.89, 42,225.81 and 20,843.19

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Solution

The fourth proportional to 28,205.89, 42,225.81 and 20,843.19 is: 31,203.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,205.89 : 42,225.81 = 20,843.19 : x
  2. Step 2: Convert to fraction form
    28,205.89/42,225.81 = 20,843.19/x
  3. Step 3: Cross multiply
    28,205.89x = 42,225.81 × 20,843.19
  4. Step 4: Simplify right side
    28,205.89x = 880,120,502.57
  5. Step 5: Solve for x
    x = 880,120,502.57/28,205.89
  6. Step 6: Final answer
    x = 31,203.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.