Home / 19,120.12-28,680.12-12,544.72

Finding the Fourth Proportional to 19,120.12, 28,680.12 and 12,544.72

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Solution

The fourth proportional to 19,120.12, 28,680.12 and 12,544.72 is: 18,817.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,120.12 : 28,680.12 = 12,544.72 : x
  2. Step 2: Convert to fraction form
    19,120.12/28,680.12 = 12,544.72/x
  3. Step 3: Cross multiply
    19,120.12x = 28,680.12 × 12,544.72
  4. Step 4: Simplify right side
    19,120.12x = 359,784,074.97
  5. Step 5: Solve for x
    x = 359,784,074.97/19,120.12
  6. Step 6: Final answer
    x = 18,817.04

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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.