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Finding the Fourth Proportional to 18,726.31, 28,093.65 and 7,039.63

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Solution

The fourth proportional to 18,726.31, 28,093.65 and 7,039.63 is: 10,561.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,726.31 : 28,093.65 = 7,039.63 : x
  2. Step 2: Convert to fraction form
    18,726.31/28,093.65 = 7,039.63/x
  3. Step 3: Cross multiply
    18,726.31x = 28,093.65 × 7,039.63
  4. Step 4: Simplify right side
    18,726.31x = 197,768,901.35
  5. Step 5: Solve for x
    x = 197,768,901.35/18,726.31
  6. Step 6: Final answer
    x = 10,561.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.