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Finding the Fourth Proportional to 17,128.88, 25,692.92 and 7,894.88

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Solution

The fourth proportional to 17,128.88, 25,692.92 and 7,894.88 is: 11,842.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,128.88 : 25,692.92 = 7,894.88 : x
  2. Step 2: Convert to fraction form
    17,128.88/25,692.92 = 7,894.88/x
  3. Step 3: Cross multiply
    17,128.88x = 25,692.92 × 7,894.88
  4. Step 4: Simplify right side
    17,128.88x = 202,842,520.25
  5. Step 5: Solve for x
    x = 202,842,520.25/17,128.88
  6. Step 6: Final answer
    x = 11,842.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.