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Finding the Fourth Proportional to 27,978.57, 38,611.16 and 17,219.45

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Solution

The fourth proportional to 27,978.57, 38,611.16 and 17,219.45 is: 23,763.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,978.57 : 38,611.16 = 17,219.45 : x
  2. Step 2: Convert to fraction form
    27,978.57/38,611.16 = 17,219.45/x
  3. Step 3: Cross multiply
    27,978.57x = 38,611.16 × 17,219.45
  4. Step 4: Simplify right side
    27,978.57x = 664,862,659.91
  5. Step 5: Solve for x
    x = 664,862,659.91/27,978.57
  6. Step 6: Final answer
    x = 23,763.28

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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.