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Finding the Fourth Proportional to 18,803.84, 25,931.39 and 11,248.97

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Solution

The fourth proportional to 18,803.84, 25,931.39 and 11,248.97 is: 15,512.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.84 : 25,931.39 = 11,248.97 : x
  2. Step 2: Convert to fraction form
    18,803.84/25,931.39 = 11,248.97/x
  3. Step 3: Cross multiply
    18,803.84x = 25,931.39 × 11,248.97
  4. Step 4: Simplify right side
    18,803.84x = 291,701,242.27
  5. Step 5: Solve for x
    x = 291,701,242.27/18,803.84
  6. Step 6: Final answer
    x = 15,512.86

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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.