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Finding the Fourth Proportional to 18,703.80, 25,817.10 and 12,007.32

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Solution

The fourth proportional to 18,703.80, 25,817.10 and 12,007.32 is: 16,573.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.80 : 25,817.10 = 12,007.32 : x
  2. Step 2: Convert to fraction form
    18,703.80/25,817.10 = 12,007.32/x
  3. Step 3: Cross multiply
    18,703.80x = 25,817.10 × 12,007.32
  4. Step 4: Simplify right side
    18,703.80x = 309,994,181.17
  5. Step 5: Solve for x
    x = 309,994,181.17/18,703.80
  6. Step 6: Final answer
    x = 16,573.86

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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.