Home / 28,448.75-42,638.57-20,131.20

Finding the Fourth Proportional to 28,448.75, 42,638.57 and 20,131.20

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Solution

The fourth proportional to 28,448.75, 42,638.57 and 20,131.20 is: 30,172.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,448.75 : 42,638.57 = 20,131.20 : x
  2. Step 2: Convert to fraction form
    28,448.75/42,638.57 = 20,131.20/x
  3. Step 3: Cross multiply
    28,448.75x = 42,638.57 × 20,131.20
  4. Step 4: Simplify right side
    28,448.75x = 858,365,555.22
  5. Step 5: Solve for x
    x = 858,365,555.22/28,448.75
  6. Step 6: Final answer
    x = 30,172.34

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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.