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Finding the Fourth Proportional to 12,822.64, 17,694.08 and 7,156.96

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Solution

The fourth proportional to 12,822.64, 17,694.08 and 7,156.96 is: 9,875.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,822.64 : 17,694.08 = 7,156.96 : x
  2. Step 2: Convert to fraction form
    12,822.64/17,694.08 = 7,156.96/x
  3. Step 3: Cross multiply
    12,822.64x = 17,694.08 × 7,156.96
  4. Step 4: Simplify right side
    12,822.64x = 126,635,822.80
  5. Step 5: Solve for x
    x = 126,635,822.80/12,822.64
  6. Step 6: Final answer
    x = 9,875.96

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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.