Home / 12,679.28-17,504.30-7,644.40

Finding the Fourth Proportional to 12,679.28, 17,504.30 and 7,644.40

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Solution

The fourth proportional to 12,679.28, 17,504.30 and 7,644.40 is: 10,553.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.28 : 17,504.30 = 7,644.40 : x
  2. Step 2: Convert to fraction form
    12,679.28/17,504.30 = 7,644.40/x
  3. Step 3: Cross multiply
    12,679.28x = 17,504.30 × 7,644.40
  4. Step 4: Simplify right side
    12,679.28x = 133,809,870.92
  5. Step 5: Solve for x
    x = 133,809,870.92/12,679.28
  6. Step 6: Final answer
    x = 10,553.43

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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.