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Finding the Fourth Proportional to 18,649.44, 27,971.76 and 5,503.20

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Solution

The fourth proportional to 18,649.44, 27,971.76 and 5,503.20 is: 8,254.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,649.44 : 27,971.76 = 5,503.20 : x
  2. Step 2: Convert to fraction form
    18,649.44/27,971.76 = 5,503.20/x
  3. Step 3: Cross multiply
    18,649.44x = 27,971.76 × 5,503.20
  4. Step 4: Simplify right side
    18,649.44x = 153,934,189.63
  5. Step 5: Solve for x
    x = 153,934,189.63/18,649.44
  6. Step 6: Final answer
    x = 8,254.09

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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.