Home / 20,388.77-30,572.78-7,912.37

Finding the Fourth Proportional to 20,388.77, 30,572.78 and 7,912.37

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Solution

The fourth proportional to 20,388.77, 30,572.78 and 7,912.37 is: 11,864.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.77 : 30,572.78 = 7,912.37 : x
  2. Step 2: Convert to fraction form
    20,388.77/30,572.78 = 7,912.37/x
  3. Step 3: Cross multiply
    20,388.77x = 30,572.78 × 7,912.37
  4. Step 4: Simplify right side
    20,388.77x = 241,903,184.16
  5. Step 5: Solve for x
    x = 241,903,184.16/20,388.77
  6. Step 6: Final answer
    x = 11,864.53

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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.