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Finding the Fourth Proportional to 15,139.98, 20,893.65 and 9,472.92

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Solution

The fourth proportional to 15,139.98, 20,893.65 and 9,472.92 is: 13,072.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139.98 : 20,893.65 = 9,472.92 : x
  2. Step 2: Convert to fraction form
    15,139.98/20,893.65 = 9,472.92/x
  3. Step 3: Cross multiply
    15,139.98x = 20,893.65 × 9,472.92
  4. Step 4: Simplify right side
    15,139.98x = 197,923,874.96
  5. Step 5: Solve for x
    x = 197,923,874.96/15,139.98
  6. Step 6: Final answer
    x = 13,072.93

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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.