Home / 20,561.75-28,375.23-11,130.32

Finding the Fourth Proportional to 20,561.75, 28,375.23 and 11,130.32

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Solution

The fourth proportional to 20,561.75, 28,375.23 and 11,130.32 is: 15,359.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.75 : 28,375.23 = 11,130.32 : x
  2. Step 2: Convert to fraction form
    20,561.75/28,375.23 = 11,130.32/x
  3. Step 3: Cross multiply
    20,561.75x = 28,375.23 × 11,130.32
  4. Step 4: Simplify right side
    20,561.75x = 315,825,389.97
  5. Step 5: Solve for x
    x = 315,825,389.97/20,561.75
  6. Step 6: Final answer
    x = 15,359.85

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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.