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Finding the Fourth Proportional to 15,898.76, 21,942.31 and 9,611.12

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Solution

The fourth proportional to 15,898.76, 21,942.31 and 9,611.12 is: 13,264.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,898.76 : 21,942.31 = 9,611.12 : x
  2. Step 2: Convert to fraction form
    15,898.76/21,942.31 = 9,611.12/x
  3. Step 3: Cross multiply
    15,898.76x = 21,942.31 × 9,611.12
  4. Step 4: Simplify right side
    15,898.76x = 210,890,174.49
  5. Step 5: Solve for x
    x = 210,890,174.49/15,898.76
  6. Step 6: Final answer
    x = 13,264.57

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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.