Home / 18,785.90-28,158.51-12,216.80

Finding the Fourth Proportional to 18,785.90, 28,158.51 and 12,216.80

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Solution

The fourth proportional to 18,785.90, 28,158.51 and 12,216.80 is: 18,311.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.90 : 28,158.51 = 12,216.80 : x
  2. Step 2: Convert to fraction form
    18,785.90/28,158.51 = 12,216.80/x
  3. Step 3: Cross multiply
    18,785.90x = 28,158.51 × 12,216.80
  4. Step 4: Simplify right side
    18,785.90x = 344,006,884.97
  5. Step 5: Solve for x
    x = 344,006,884.97/18,785.90
  6. Step 6: Final answer
    x = 18,311.97

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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.