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Finding the Fourth Proportional to 18,890.80, 28,336.19 and 9,000.09

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Solution

The fourth proportional to 18,890.80, 28,336.19 and 9,000.09 is: 13,500.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,890.80 : 28,336.19 = 9,000.09 : x
  2. Step 2: Convert to fraction form
    18,890.80/28,336.19 = 9,000.09/x
  3. Step 3: Cross multiply
    18,890.80x = 28,336.19 × 9,000.09
  4. Step 4: Simplify right side
    18,890.80x = 255,028,260.26
  5. Step 5: Solve for x
    x = 255,028,260.26/18,890.80
  6. Step 6: Final answer
    x = 13,500.13

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Similar ratio
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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.