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Finding the Fourth Proportional to 18,459.76, 27,672.54 and 7,363.72

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Solution

The fourth proportional to 18,459.76, 27,672.54 and 7,363.72 is: 11,038.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,459.76 : 27,672.54 = 7,363.72 : x
  2. Step 2: Convert to fraction form
    18,459.76/27,672.54 = 7,363.72/x
  3. Step 3: Cross multiply
    18,459.76x = 27,672.54 × 7,363.72
  4. Step 4: Simplify right side
    18,459.76x = 203,772,836.25
  5. Step 5: Solve for x
    x = 203,772,836.25/18,459.76
  6. Step 6: Final answer
    x = 11,038.76

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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.