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Finding the Fourth Proportional to 28,894.88, 39,866.28 and 19,943.12

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Solution

The fourth proportional to 28,894.88, 39,866.28 and 19,943.12 is: 27,515.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,894.88 : 39,866.28 = 19,943.12 : x
  2. Step 2: Convert to fraction form
    28,894.88/39,866.28 = 19,943.12/x
  3. Step 3: Cross multiply
    28,894.88x = 39,866.28 × 19,943.12
  4. Step 4: Simplify right side
    28,894.88x = 795,058,005.99
  5. Step 5: Solve for x
    x = 795,058,005.99/28,894.88
  6. Step 6: Final answer
    x = 27,515.53

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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.