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Finding the Fourth Proportional to 18,174.70, 25,070.63 and 11,356.90

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Solution

The fourth proportional to 18,174.70, 25,070.63 and 11,356.90 is: 15,665.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,174.70 : 25,070.63 = 11,356.90 : x
  2. Step 2: Convert to fraction form
    18,174.70/25,070.63 = 11,356.90/x
  3. Step 3: Cross multiply
    18,174.70x = 25,070.63 × 11,356.90
  4. Step 4: Simplify right side
    18,174.70x = 284,724,637.85
  5. Step 5: Solve for x
    x = 284,724,637.85/18,174.70
  6. Step 6: Final answer
    x = 15,665.99

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1.5x scale

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.