Home / 13,222.64-19,836.96-7,680.60

Finding the Fourth Proportional to 13,222.64, 19,836.96 and 7,680.60

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Solution

The fourth proportional to 13,222.64, 19,836.96 and 7,680.60 is: 11,522.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,222.64 : 19,836.96 = 7,680.60 : x
  2. Step 2: Convert to fraction form
    13,222.64/19,836.96 = 7,680.60/x
  3. Step 3: Cross multiply
    13,222.64x = 19,836.96 × 7,680.60
  4. Step 4: Simplify right side
    13,222.64x = 152,359,754.98
  5. Step 5: Solve for x
    x = 152,359,754.98/13,222.64
  6. Step 6: Final answer
    x = 11,522.64

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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.