Home / 12,519.97-18,782.08-4,200.80

Finding the Fourth Proportional to 12,519.97, 18,782.08 and 4,200.80

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Solution

The fourth proportional to 12,519.97, 18,782.08 and 4,200.80 is: 6,301.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,519.97 : 18,782.08 = 4,200.80 : x
  2. Step 2: Convert to fraction form
    12,519.97/18,782.08 = 4,200.80/x
  3. Step 3: Cross multiply
    12,519.97x = 18,782.08 × 4,200.80
  4. Step 4: Simplify right side
    12,519.97x = 78,899,657.25
  5. Step 5: Solve for x
    x = 78,899,657.25/12,519.97
  6. Step 6: Final answer
    x = 6,301.91

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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.