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Finding the Fourth Proportional to 18,908.70, 28,363.05 and 14,000.10

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Solution

The fourth proportional to 18,908.70, 28,363.05 and 14,000.10 is: 21,000.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,908.70 : 28,363.05 = 14,000.10 : x
  2. Step 2: Convert to fraction form
    18,908.70/28,363.05 = 14,000.10/x
  3. Step 3: Cross multiply
    18,908.70x = 28,363.05 × 14,000.10
  4. Step 4: Simplify right side
    18,908.70x = 397,085,536.31
  5. Step 5: Solve for x
    x = 397,085,536.31/18,908.70
  6. Step 6: Final answer
    x = 21,000.15

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Similar ratio
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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.