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Finding the Fourth Proportional to 18,783.20, 25,893.12 and 14,299.12

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Solution

The fourth proportional to 18,783.20, 25,893.12 and 14,299.12 is: 19,711.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.20 : 25,893.12 = 14,299.12 : x
  2. Step 2: Convert to fraction form
    18,783.20/25,893.12 = 14,299.12/x
  3. Step 3: Cross multiply
    18,783.20x = 25,893.12 × 14,299.12
  4. Step 4: Simplify right side
    18,783.20x = 370,248,830.05
  5. Step 5: Solve for x
    x = 370,248,830.05/18,783.20
  6. Step 6: Final answer
    x = 19,711.70

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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.