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Finding the Fourth Proportional to 18,459.70, 25,474.98 and 10,076.20

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Solution

The fourth proportional to 18,459.70, 25,474.98 and 10,076.20 is: 13,905.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,459.70 : 25,474.98 = 10,076.20 : x
  2. Step 2: Convert to fraction form
    18,459.70/25,474.98 = 10,076.20/x
  3. Step 3: Cross multiply
    18,459.70x = 25,474.98 × 10,076.20
  4. Step 4: Simplify right side
    18,459.70x = 256,690,993.48
  5. Step 5: Solve for x
    x = 256,690,993.48/18,459.70
  6. Step 6: Final answer
    x = 13,905.48

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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.