Home / 21,152.76-31,729.62-7,112.96

Finding the Fourth Proportional to 21,152.76, 31,729.62 and 7,112.96

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Solution

The fourth proportional to 21,152.76, 31,729.62 and 7,112.96 is: 10,669.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152.76 : 31,729.62 = 7,112.96 : x
  2. Step 2: Convert to fraction form
    21,152.76/31,729.62 = 7,112.96/x
  3. Step 3: Cross multiply
    21,152.76x = 31,729.62 × 7,112.96
  4. Step 4: Simplify right side
    21,152.76x = 225,691,517.88
  5. Step 5: Solve for x
    x = 225,691,517.88/21,152.76
  6. Step 6: Final answer
    x = 10,669.60

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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.