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Finding the Fourth Proportional to 18,859.83, 26,030.21 and 12,486.57

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Solution

The fourth proportional to 18,859.83, 26,030.21 and 12,486.57 is: 17,233.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,859.83 : 26,030.21 = 12,486.57 : x
  2. Step 2: Convert to fraction form
    18,859.83/26,030.21 = 12,486.57/x
  3. Step 3: Cross multiply
    18,859.83x = 26,030.21 × 12,486.57
  4. Step 4: Simplify right side
    18,859.83x = 325,027,976.85
  5. Step 5: Solve for x
    x = 325,027,976.85/18,859.83
  6. Step 6: Final answer
    x = 17,233.88

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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.