Home / 20,940.16-28,897.44-11,509.20

Finding the Fourth Proportional to 20,940.16, 28,897.44 and 11,509.20

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Solution

The fourth proportional to 20,940.16, 28,897.44 and 11,509.20 is: 15,882.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.16 : 28,897.44 = 11,509.20 : x
  2. Step 2: Convert to fraction form
    20,940.16/28,897.44 = 11,509.20/x
  3. Step 3: Cross multiply
    20,940.16x = 28,897.44 × 11,509.20
  4. Step 4: Simplify right side
    20,940.16x = 332,586,416.45
  5. Step 5: Solve for x
    x = 332,586,416.45/20,940.16
  6. Step 6: Final answer
    x = 15,882.71

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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.