Home / 20,836.64-31,245.36-7,688.48

Finding the Fourth Proportional to 20,836.64, 31,245.36 and 7,688.48

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Solution

The fourth proportional to 20,836.64, 31,245.36 and 7,688.48 is: 11,529.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.64 : 31,245.36 = 7,688.48 : x
  2. Step 2: Convert to fraction form
    20,836.64/31,245.36 = 7,688.48/x
  3. Step 3: Cross multiply
    20,836.64x = 31,245.36 × 7,688.48
  4. Step 4: Simplify right side
    20,836.64x = 240,229,325.45
  5. Step 5: Solve for x
    x = 240,229,325.45/20,836.64
  6. Step 6: Final answer
    x = 11,529.18

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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.