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Finding the Fourth Proportional to 14,490.80, 21,736.20 and 5,722.16

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Solution

The fourth proportional to 14,490.80, 21,736.20 and 5,722.16 is: 8,583.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,490.80 : 21,736.20 = 5,722.16 : x
  2. Step 2: Convert to fraction form
    14,490.80/21,736.20 = 5,722.16/x
  3. Step 3: Cross multiply
    14,490.80x = 21,736.20 × 5,722.16
  4. Step 4: Simplify right side
    14,490.80x = 124,378,014.19
  5. Step 5: Solve for x
    x = 124,378,014.19/14,490.80
  6. Step 6: Final answer
    x = 8,583.24

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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.