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Finding the Fourth Proportional to 19,543.62, 26,972.02 and 11,158.50

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Solution

The fourth proportional to 19,543.62, 26,972.02 and 11,158.50 is: 15,399.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,543.62 : 26,972.02 = 11,158.50 : x
  2. Step 2: Convert to fraction form
    19,543.62/26,972.02 = 11,158.50/x
  3. Step 3: Cross multiply
    19,543.62x = 26,972.02 × 11,158.50
  4. Step 4: Simplify right side
    19,543.62x = 300,967,285.17
  5. Step 5: Solve for x
    x = 300,967,285.17/19,543.62
  6. Step 6: Final answer
    x = 15,399.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.