Home / 20,940.90-28,898.28-11,509.44

Finding the Fourth Proportional to 20,940.90, 28,898.28 and 11,509.44

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Solution

The fourth proportional to 20,940.90, 28,898.28 and 11,509.44 is: 15,882.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.90 : 28,898.28 = 11,509.44 : x
  2. Step 2: Convert to fraction form
    20,940.90/28,898.28 = 11,509.44/x
  3. Step 3: Cross multiply
    20,940.90x = 28,898.28 × 11,509.44
  4. Step 4: Simplify right side
    20,940.90x = 332,603,019.76
  5. Step 5: Solve for x
    x = 332,603,019.76/20,940.90
  6. Step 6: Final answer
    x = 15,882.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.