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Finding the Fourth Proportional to 15,894.88, 21,936.27 and 8,821.15

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Solution

The fourth proportional to 15,894.88, 21,936.27 and 8,821.15 is: 12,173.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,894.88 : 21,936.27 = 8,821.15 : x
  2. Step 2: Convert to fraction form
    15,894.88/21,936.27 = 8,821.15/x
  3. Step 3: Cross multiply
    15,894.88x = 21,936.27 × 8,821.15
  4. Step 4: Simplify right side
    15,894.88x = 193,503,128.11
  5. Step 5: Solve for x
    x = 193,503,128.11/15,894.88
  6. Step 6: Final answer
    x = 12,173.93

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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.