Home / 12,439.12-17,157.36-7,960.84

Finding the Fourth Proportional to 12,439.12, 17,157.36 and 7,960.84

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Solution

The fourth proportional to 12,439.12, 17,157.36 and 7,960.84 is: 10,980.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.12 : 17,157.36 = 7,960.84 : x
  2. Step 2: Convert to fraction form
    12,439.12/17,157.36 = 7,960.84/x
  3. Step 3: Cross multiply
    12,439.12x = 17,157.36 × 7,960.84
  4. Step 4: Simplify right side
    12,439.12x = 136,586,997.78
  5. Step 5: Solve for x
    x = 136,586,997.78/12,439.12
  6. Step 6: Final answer
    x = 10,980.44

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Similar ratio
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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.