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Finding the Fourth Proportional to 18,649.40, 25,736.64 and 10,151.98

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Solution

The fourth proportional to 18,649.40, 25,736.64 and 10,151.98 is: 14,009.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,649.40 : 25,736.64 = 10,151.98 : x
  2. Step 2: Convert to fraction form
    18,649.40/25,736.64 = 10,151.98/x
  3. Step 3: Cross multiply
    18,649.40x = 25,736.64 × 10,151.98
  4. Step 4: Simplify right side
    18,649.40x = 261,277,854.55
  5. Step 5: Solve for x
    x = 261,277,854.55/18,649.40
  6. Step 6: Final answer
    x = 14,009.99

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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.