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Finding the Fourth Proportional to 18,521.84, 25,568.48 and 11,816.48

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Solution

The fourth proportional to 18,521.84, 25,568.48 and 11,816.48 is: 16,312.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,521.84 : 25,568.48 = 11,816.48 : x
  2. Step 2: Convert to fraction form
    18,521.84/25,568.48 = 11,816.48/x
  3. Step 3: Cross multiply
    18,521.84x = 25,568.48 × 11,816.48
  4. Step 4: Simplify right side
    18,521.84x = 302,129,432.55
  5. Step 5: Solve for x
    x = 302,129,432.55/18,521.84
  6. Step 6: Final answer
    x = 16,312.06

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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.