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Finding the Fourth Proportional to 28,136.51, 38,827.12 and 16,197.31

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Solution

The fourth proportional to 28,136.51, 38,827.12 and 16,197.31 is: 22,351.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,136.51 : 38,827.12 = 16,197.31 : x
  2. Step 2: Convert to fraction form
    28,136.51/38,827.12 = 16,197.31/x
  3. Step 3: Cross multiply
    28,136.51x = 38,827.12 × 16,197.31
  4. Step 4: Simplify right side
    28,136.51x = 628,894,761.49
  5. Step 5: Solve for x
    x = 628,894,761.49/28,136.51
  6. Step 6: Final answer
    x = 22,351.56

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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.