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Finding the Fourth Proportional to 12,551.76, 17,321.28 and 6,962.88

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Solution

The fourth proportional to 12,551.76, 17,321.28 and 6,962.88 is: 9,608.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,551.76 : 17,321.28 = 6,962.88 : x
  2. Step 2: Convert to fraction form
    12,551.76/17,321.28 = 6,962.88/x
  3. Step 3: Cross multiply
    12,551.76x = 17,321.28 × 6,962.88
  4. Step 4: Simplify right side
    12,551.76x = 120,605,994.09
  5. Step 5: Solve for x
    x = 120,605,994.09/12,551.76
  6. Step 6: Final answer
    x = 9,608.69

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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.