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Finding the Fourth Proportional to 18,842.76, 26,003.70 and 10,885.86

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Solution

The fourth proportional to 18,842.76, 26,003.70 and 10,885.86 is: 15,022.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,842.76 : 26,003.70 = 10,885.86 : x
  2. Step 2: Convert to fraction form
    18,842.76/26,003.70 = 10,885.86/x
  3. Step 3: Cross multiply
    18,842.76x = 26,003.70 × 10,885.86
  4. Step 4: Simplify right side
    18,842.76x = 283,072,637.68
  5. Step 5: Solve for x
    x = 283,072,637.68/18,842.76
  6. Step 6: Final answer
    x = 15,022.89

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Half scale
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Double scale
Find fourth proportional to 18,843.76, 26,005.08 and 10,886.86
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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.