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Finding the Fourth Proportional to 18,706.68, 25,814.16 and 11,161.53

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Solution

The fourth proportional to 18,706.68, 25,814.16 and 11,161.53 is: 15,402.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.68 : 25,814.16 = 11,161.53 : x
  2. Step 2: Convert to fraction form
    18,706.68/25,814.16 = 11,161.53/x
  3. Step 3: Cross multiply
    18,706.68x = 25,814.16 × 11,161.53
  4. Step 4: Simplify right side
    18,706.68x = 288,125,521.26
  5. Step 5: Solve for x
    x = 288,125,521.26/18,706.68
  6. Step 6: Final answer
    x = 15,402.28

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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.