Home / 11,283.06-16,905.42-7,980

Finding the Fourth Proportional to 11,283.06, 16,905.42 and 7,980

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Solution

The fourth proportional to 11,283.06, 16,905.42 and 7,980 is: 11,956.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,283.06 : 16,905.42 = 7,980 : x
  2. Step 2: Convert to fraction form
    11,283.06/16,905.42 = 7,980/x
  3. Step 3: Cross multiply
    11,283.06x = 16,905.42 × 7,980
  4. Step 4: Simplify right side
    11,283.06x = 134,905,251.60
  5. Step 5: Solve for x
    x = 134,905,251.60/11,283.06
  6. Step 6: Final answer
    x = 11,956.44

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1.5x scale

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.