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Finding the Fourth Proportional to 18,782.01, 25,920.05 and 10,398.69

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Solution

The fourth proportional to 18,782.01, 25,920.05 and 10,398.69 is: 14,350.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,782.01 : 25,920.05 = 10,398.69 : x
  2. Step 2: Convert to fraction form
    18,782.01/25,920.05 = 10,398.69/x
  3. Step 3: Cross multiply
    18,782.01x = 25,920.05 × 10,398.69
  4. Step 4: Simplify right side
    18,782.01x = 269,534,512.74
  5. Step 5: Solve for x
    x = 269,534,512.74/18,782.01
  6. Step 6: Final answer
    x = 14,350.67

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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.