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Finding the Fourth Proportional to 28,193.90, 38,904.87 and 16,861.10

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Solution

The fourth proportional to 28,193.90, 38,904.87 and 16,861.10 is: 23,266.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,193.90 : 38,904.87 = 16,861.10 : x
  2. Step 2: Convert to fraction form
    28,193.90/38,904.87 = 16,861.10/x
  3. Step 3: Cross multiply
    28,193.90x = 38,904.87 × 16,861.10
  4. Step 4: Simplify right side
    28,193.90x = 655,978,903.56
  5. Step 5: Solve for x
    x = 655,978,903.56/28,193.90
  6. Step 6: Final answer
    x = 23,266.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.