Home / 12,172.97-18,259.61-4,780.91

Finding the Fourth Proportional to 12,172.97, 18,259.61 and 4,780.91

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Solution

The fourth proportional to 12,172.97, 18,259.61 and 4,780.91 is: 7,171.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,172.97 : 18,259.61 = 4,780.91 : x
  2. Step 2: Convert to fraction form
    12,172.97/18,259.61 = 4,780.91/x
  3. Step 3: Cross multiply
    12,172.97x = 18,259.61 × 4,780.91
  4. Step 4: Simplify right side
    12,172.97x = 87,297,573.79
  5. Step 5: Solve for x
    x = 87,297,573.79/12,172.97
  6. Step 6: Final answer
    x = 7,171.43

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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.