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Finding the Fourth Proportional to 21,051.92, 29,053.59 and 14,687.75

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Solution

The fourth proportional to 21,051.92, 29,053.59 and 14,687.75 is: 20,270.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.92 : 29,053.59 = 14,687.75 : x
  2. Step 2: Convert to fraction form
    21,051.92/29,053.59 = 14,687.75/x
  3. Step 3: Cross multiply
    21,051.92x = 29,053.59 × 14,687.75
  4. Step 4: Simplify right side
    21,051.92x = 426,731,866.52
  5. Step 5: Solve for x
    x = 426,731,866.52/21,051.92
  6. Step 6: Final answer
    x = 20,270.45

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.