Home / 28,448.57-42,638.28-20,131.02

Finding the Fourth Proportional to 28,448.57, 42,638.28 and 20,131.02

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Solution

The fourth proportional to 28,448.57, 42,638.28 and 20,131.02 is: 30,172.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,448.57 : 42,638.28 = 20,131.02 : x
  2. Step 2: Convert to fraction form
    28,448.57/42,638.28 = 20,131.02/x
  3. Step 3: Cross multiply
    28,448.57x = 42,638.28 × 20,131.02
  4. Step 4: Simplify right side
    28,448.57x = 858,352,067.45
  5. Step 5: Solve for x
    x = 858,352,067.45/28,448.57
  6. Step 6: Final answer
    x = 30,172.07

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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.