Home / 12,642-18,964.80-6,717.34

Finding the Fourth Proportional to 12,642, 18,964.80 and 6,717.34

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Solution

The fourth proportional to 12,642, 18,964.80 and 6,717.34 is: 10,076.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,642 : 18,964.80 = 6,717.34 : x
  2. Step 2: Convert to fraction form
    12,642/18,964.80 = 6,717.34/x
  3. Step 3: Cross multiply
    12,642x = 18,964.80 × 6,717.34
  4. Step 4: Simplify right side
    12,642x = 127,393,009.63
  5. Step 5: Solve for x
    x = 127,393,009.63/12,642
  6. Step 6: Final answer
    x = 10,076.97

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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.