Home / 28,135.74-42,144.06-18,245.64

Finding the Fourth Proportional to 28,135.74, 42,144.06 and 18,245.64

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Solution

The fourth proportional to 28,135.74, 42,144.06 and 18,245.64 is: 27,329.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.74 : 42,144.06 = 18,245.64 : x
  2. Step 2: Convert to fraction form
    28,135.74/42,144.06 = 18,245.64/x
  3. Step 3: Cross multiply
    28,135.74x = 42,144.06 × 18,245.64
  4. Step 4: Simplify right side
    28,135.74x = 768,945,346.90
  5. Step 5: Solve for x
    x = 768,945,346.90/28,135.74
  6. Step 6: Final answer
    x = 27,329.84

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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.