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Finding the Fourth Proportional to 18,810.08, 28,221.08 and 11,321.84

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Solution

The fourth proportional to 18,810.08, 28,221.08 and 11,321.84 is: 16,986.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.08 : 28,221.08 = 11,321.84 : x
  2. Step 2: Convert to fraction form
    18,810.08/28,221.08 = 11,321.84/x
  3. Step 3: Cross multiply
    18,810.08x = 28,221.08 × 11,321.84
  4. Step 4: Simplify right side
    18,810.08x = 319,514,552.39
  5. Step 5: Solve for x
    x = 319,514,552.39/18,810.08
  6. Step 6: Final answer
    x = 16,986.35

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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.