Home / 18,997.20-28,528.20-12,452.40

Finding the Fourth Proportional to 18,997.20, 28,528.20 and 12,452.40

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Solution

The fourth proportional to 18,997.20, 28,528.20 and 12,452.40 is: 18,699.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,997.20 : 28,528.20 = 12,452.40 : x
  2. Step 2: Convert to fraction form
    18,997.20/28,528.20 = 12,452.40/x
  3. Step 3: Cross multiply
    18,997.20x = 28,528.20 × 12,452.40
  4. Step 4: Simplify right side
    18,997.20x = 355,244,557.68
  5. Step 5: Solve for x
    x = 355,244,557.68/18,997.20
  6. Step 6: Final answer
    x = 18,699.84

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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.