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Finding the Fourth Proportional to 18,784.44, 28,205.19 and 11,807.91

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Solution

The fourth proportional to 18,784.44, 28,205.19 and 11,807.91 is: 17,729.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,784.44 : 28,205.19 = 11,807.91 : x
  2. Step 2: Convert to fraction form
    18,784.44/28,205.19 = 11,807.91/x
  3. Step 3: Cross multiply
    18,784.44x = 28,205.19 × 11,807.91
  4. Step 4: Simplify right side
    18,784.44x = 333,044,345.05
  5. Step 5: Solve for x
    x = 333,044,345.05/18,784.44
  6. Step 6: Final answer
    x = 17,729.80

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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.