Home / 28,137.87-42,194.34-8,412.75

Finding the Fourth Proportional to 28,137.87, 42,194.34 and 8,412.75

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Solution

The fourth proportional to 28,137.87, 42,194.34 and 8,412.75 is: 12,615.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137.87 : 42,194.34 = 8,412.75 : x
  2. Step 2: Convert to fraction form
    28,137.87/42,194.34 = 8,412.75/x
  3. Step 3: Cross multiply
    28,137.87x = 42,194.34 × 8,412.75
  4. Step 4: Simplify right side
    28,137.87x = 354,970,433.84
  5. Step 5: Solve for x
    x = 354,970,433.84/28,137.87
  6. Step 6: Final answer
    x = 12,615.40

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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.