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Finding the Fourth Proportional to 14,360.80, 21,541.92 and 5,126.80

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Solution

The fourth proportional to 14,360.80, 21,541.92 and 5,126.80 is: 7,690.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,360.80 : 21,541.92 = 5,126.80 : x
  2. Step 2: Convert to fraction form
    14,360.80/21,541.92 = 5,126.80/x
  3. Step 3: Cross multiply
    14,360.80x = 21,541.92 × 5,126.80
  4. Step 4: Simplify right side
    14,360.80x = 110,441,115.46
  5. Step 5: Solve for x
    x = 110,441,115.46/14,360.80
  6. Step 6: Final answer
    x = 7,690.46

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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.