Home / 20,940.93-28,898.78-11,509.70

Finding the Fourth Proportional to 20,940.93, 28,898.78 and 11,509.70

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Solution

The fourth proportional to 20,940.93, 28,898.78 and 11,509.70 is: 15,883.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.93 : 28,898.78 = 11,509.70 : x
  2. Step 2: Convert to fraction form
    20,940.93/28,898.78 = 11,509.70/x
  3. Step 3: Cross multiply
    20,940.93x = 28,898.78 × 11,509.70
  4. Step 4: Simplify right side
    20,940.93x = 332,616,086.12
  5. Step 5: Solve for x
    x = 332,616,086.12/20,940.93
  6. Step 6: Final answer
    x = 15,883.54

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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.