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Finding the Fourth Proportional to 18,897.42, 28,336.41 and 8,503.50

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Solution

The fourth proportional to 18,897.42, 28,336.41 and 8,503.50 is: 12,750.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,897.42 : 28,336.41 = 8,503.50 : x
  2. Step 2: Convert to fraction form
    18,897.42/28,336.41 = 8,503.50/x
  3. Step 3: Cross multiply
    18,897.42x = 28,336.41 × 8,503.50
  4. Step 4: Simplify right side
    18,897.42x = 240,958,662.44
  5. Step 5: Solve for x
    x = 240,958,662.44/18,897.42
  6. Step 6: Final answer
    x = 12,750.88

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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.