Home / 12,287.52-18,431.30-8,389.80

Finding the Fourth Proportional to 12,287.52, 18,431.30 and 8,389.80

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Solution

The fourth proportional to 12,287.52, 18,431.30 and 8,389.80 is: 12,584.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,287.52 : 18,431.30 = 8,389.80 : x
  2. Step 2: Convert to fraction form
    12,287.52/18,431.30 = 8,389.80/x
  3. Step 3: Cross multiply
    12,287.52x = 18,431.30 × 8,389.80
  4. Step 4: Simplify right side
    12,287.52x = 154,634,920.74
  5. Step 5: Solve for x
    x = 154,634,920.74/12,287.52
  6. Step 6: Final answer
    x = 12,584.71

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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.