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Finding the Fourth Proportional to 31,482.96, 43,418.40 and 22,390.48

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Solution

The fourth proportional to 31,482.96, 43,418.40 and 22,390.48 is: 30,878.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,482.96 : 43,418.40 = 22,390.48 : x
  2. Step 2: Convert to fraction form
    31,482.96/43,418.40 = 22,390.48/x
  3. Step 3: Cross multiply
    31,482.96x = 43,418.40 × 22,390.48
  4. Step 4: Simplify right side
    31,482.96x = 972,158,816.83
  5. Step 5: Solve for x
    x = 972,158,816.83/31,482.96
  6. Step 6: Final answer
    x = 30,878.89

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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.