Home / 20,476.26-30,721.50-12,629.52

Finding the Fourth Proportional to 20,476.26, 30,721.50 and 12,629.52

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Solution

The fourth proportional to 20,476.26, 30,721.50 and 12,629.52 is: 18,948.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,476.26 : 30,721.50 = 12,629.52 : x
  2. Step 2: Convert to fraction form
    20,476.26/30,721.50 = 12,629.52/x
  3. Step 3: Cross multiply
    20,476.26x = 30,721.50 × 12,629.52
  4. Step 4: Simplify right side
    20,476.26x = 387,997,798.68
  5. Step 5: Solve for x
    x = 387,997,798.68/20,476.26
  6. Step 6: Final answer
    x = 18,948.67

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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.