Home / 19,219.39-28,820.42-8,120.36

Finding the Fourth Proportional to 19,219.39, 28,820.42 and 8,120.36

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Solution

The fourth proportional to 19,219.39, 28,820.42 and 8,120.36 is: 12,176.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,219.39 : 28,820.42 = 8,120.36 : x
  2. Step 2: Convert to fraction form
    19,219.39/28,820.42 = 8,120.36/x
  3. Step 3: Cross multiply
    19,219.39x = 28,820.42 × 8,120.36
  4. Step 4: Simplify right side
    19,219.39x = 234,032,247.65
  5. Step 5: Solve for x
    x = 234,032,247.65/19,219.39
  6. Step 6: Final answer
    x = 12,176.88

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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.