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Finding the Fourth Proportional to 21,419.34, 32,131.13 and 7,377.51

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Solution

The fourth proportional to 21,419.34, 32,131.13 and 7,377.51 is: 11,066.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,419.34 : 32,131.13 = 7,377.51 : x
  2. Step 2: Convert to fraction form
    21,419.34/32,131.13 = 7,377.51/x
  3. Step 3: Cross multiply
    21,419.34x = 32,131.13 × 7,377.51
  4. Step 4: Simplify right side
    21,419.34x = 237,047,696.00
  5. Step 5: Solve for x
    x = 237,047,696.00/21,419.34
  6. Step 6: Final answer
    x = 11,066.99

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.