Home / 12,816.36-17,685.90-7,227

Finding the Fourth Proportional to 12,816.36, 17,685.90 and 7,227

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Solution

The fourth proportional to 12,816.36, 17,685.90 and 7,227 is: 9,972.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,816.36 : 17,685.90 = 7,227 : x
  2. Step 2: Convert to fraction form
    12,816.36/17,685.90 = 7,227/x
  3. Step 3: Cross multiply
    12,816.36x = 17,685.90 × 7,227
  4. Step 4: Simplify right side
    12,816.36x = 127,815,999.30
  5. Step 5: Solve for x
    x = 127,815,999.30/12,816.36
  6. Step 6: Final answer
    x = 9,972.88

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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.