Home / 18,220.32-25,146.72-11,145.60

Finding the Fourth Proportional to 18,220.32, 25,146.72 and 11,145.60

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Solution

The fourth proportional to 18,220.32, 25,146.72 and 11,145.60 is: 15,382.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,220.32 : 25,146.72 = 11,145.60 : x
  2. Step 2: Convert to fraction form
    18,220.32/25,146.72 = 11,145.60/x
  3. Step 3: Cross multiply
    18,220.32x = 25,146.72 × 11,145.60
  4. Step 4: Simplify right side
    18,220.32x = 280,275,282.43
  5. Step 5: Solve for x
    x = 280,275,282.43/18,220.32
  6. Step 6: Final answer
    x = 15,382.57

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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.