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Finding the Fourth Proportional to 19,397.68, 26,769.18 and 15,153.68

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Solution

The fourth proportional to 19,397.68, 26,769.18 and 15,153.68 is: 20,912.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,397.68 : 26,769.18 = 15,153.68 : x
  2. Step 2: Convert to fraction form
    19,397.68/26,769.18 = 15,153.68/x
  3. Step 3: Cross multiply
    19,397.68x = 26,769.18 × 15,153.68
  4. Step 4: Simplify right side
    19,397.68x = 405,651,711.33
  5. Step 5: Solve for x
    x = 405,651,711.33/19,397.68
  6. Step 6: Final answer
    x = 20,912.39

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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.