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Finding the Fourth Proportional to 28,495.74, 42,759.81 and 15,347.82

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Solution

The fourth proportional to 28,495.74, 42,759.81 and 15,347.82 is: 23,030.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,495.74 : 42,759.81 = 15,347.82 : x
  2. Step 2: Convert to fraction form
    28,495.74/42,759.81 = 15,347.82/x
  3. Step 3: Cross multiply
    28,495.74x = 42,759.81 × 15,347.82
  4. Step 4: Simplify right side
    28,495.74x = 656,269,867.11
  5. Step 5: Solve for x
    x = 656,269,867.11/28,495.74
  6. Step 6: Final answer
    x = 23,030.46

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Why These Related Problems?

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