Home / 12,456-17,189.28-6,867.36

Finding the Fourth Proportional to 12,456, 17,189.28 and 6,867.36

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Solution

The fourth proportional to 12,456, 17,189.28 and 6,867.36 is: 9,476.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,456 : 17,189.28 = 6,867.36 : x
  2. Step 2: Convert to fraction form
    12,456/17,189.28 = 6,867.36/x
  3. Step 3: Cross multiply
    12,456x = 17,189.28 × 6,867.36
  4. Step 4: Simplify right side
    12,456x = 118,044,973.90
  5. Step 5: Solve for x
    x = 118,044,973.90/12,456
  6. Step 6: Final answer
    x = 9,476.96

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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.