Home / 18,759.11-28,118.41-12,190.01

Finding the Fourth Proportional to 18,759.11, 28,118.41 and 12,190.01

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Solution

The fourth proportional to 18,759.11, 28,118.41 and 12,190.01 is: 18,271.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,759.11 : 28,118.41 = 12,190.01 : x
  2. Step 2: Convert to fraction form
    18,759.11/28,118.41 = 12,190.01/x
  3. Step 3: Cross multiply
    18,759.11x = 28,118.41 × 12,190.01
  4. Step 4: Simplify right side
    18,759.11x = 342,763,528.02
  5. Step 5: Solve for x
    x = 342,763,528.02/18,759.11
  6. Step 6: Final answer
    x = 18,271.85

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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.