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Finding the Fourth Proportional to 18,798.50, 28,193.13 and 8,271.17

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Solution

The fourth proportional to 18,798.50, 28,193.13 and 8,271.17 is: 12,404.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,798.50 : 28,193.13 = 8,271.17 : x
  2. Step 2: Convert to fraction form
    18,798.50/28,193.13 = 8,271.17/x
  3. Step 3: Cross multiply
    18,798.50x = 28,193.13 × 8,271.17
  4. Step 4: Simplify right side
    18,798.50x = 233,190,030.10
  5. Step 5: Solve for x
    x = 233,190,030.10/18,798.50
  6. Step 6: Final answer
    x = 12,404.71

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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.