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Finding the Fourth Proportional to 42,585.44, 63,880.96 and 13,005.68

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Solution

The fourth proportional to 42,585.44, 63,880.96 and 13,005.68 is: 19,509.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,585.44 : 63,880.96 = 13,005.68 : x
  2. Step 2: Convert to fraction form
    42,585.44/63,880.96 = 13,005.68/x
  3. Step 3: Cross multiply
    42,585.44x = 63,880.96 × 13,005.68
  4. Step 4: Simplify right side
    42,585.44x = 830,815,323.85
  5. Step 5: Solve for x
    x = 830,815,323.85/42,585.44
  6. Step 6: Final answer
    x = 19,509.38

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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.