Home / 21,247.52-31,871.24-10,120.46

Finding the Fourth Proportional to 21,247.52, 31,871.24 and 10,120.46

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Solution

The fourth proportional to 21,247.52, 31,871.24 and 10,120.46 is: 15,180.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,247.52 : 31,871.24 = 10,120.46 : x
  2. Step 2: Convert to fraction form
    21,247.52/31,871.24 = 10,120.46/x
  3. Step 3: Cross multiply
    21,247.52x = 31,871.24 × 10,120.46
  4. Step 4: Simplify right side
    21,247.52x = 322,551,609.57
  5. Step 5: Solve for x
    x = 322,551,609.57/21,247.52
  6. Step 6: Final answer
    x = 15,180.67

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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.