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Finding the Fourth Proportional to 31,420.61, 43,358.61 and 17,273.45

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Solution

The fourth proportional to 31,420.61, 43,358.61 and 17,273.45 is: 23,836.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,420.61 : 43,358.61 = 17,273.45 : x
  2. Step 2: Convert to fraction form
    31,420.61/43,358.61 = 17,273.45/x
  3. Step 3: Cross multiply
    31,420.61x = 43,358.61 × 17,273.45
  4. Step 4: Simplify right side
    31,420.61x = 748,952,781.90
  5. Step 5: Solve for x
    x = 748,952,781.90/31,420.61
  6. Step 6: Final answer
    x = 23,836.35

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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.