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Finding the Fourth Proportional to 15,893.97, 21,934.14 and 8,820.85

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Solution

The fourth proportional to 15,893.97, 21,934.14 and 8,820.85 is: 12,173.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,893.97 : 21,934.14 = 8,820.85 : x
  2. Step 2: Convert to fraction form
    15,893.97/21,934.14 = 8,820.85/x
  3. Step 3: Cross multiply
    15,893.97x = 21,934.14 × 8,820.85
  4. Step 4: Simplify right side
    15,893.97x = 193,477,758.82
  5. Step 5: Solve for x
    x = 193,477,758.82/15,893.97
  6. Step 6: Final answer
    x = 12,173.03

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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.