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Finding the Fourth Proportional to 14,821.91, 20,474.21 and 11,858.93

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Solution

The fourth proportional to 14,821.91, 20,474.21 and 11,858.93 is: 16,381.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,821.91 : 20,474.21 = 11,858.93 : x
  2. Step 2: Convert to fraction form
    14,821.91/20,474.21 = 11,858.93/x
  3. Step 3: Cross multiply
    14,821.91x = 20,474.21 × 11,858.93
  4. Step 4: Simplify right side
    14,821.91x = 242,802,223.20
  5. Step 5: Solve for x
    x = 242,802,223.20/14,821.91
  6. Step 6: Final answer
    x = 16,381.30

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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.