Home / 20,850.32-28,772.52-11,418.32

Finding the Fourth Proportional to 20,850.32, 28,772.52 and 11,418.32

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Solution

The fourth proportional to 20,850.32, 28,772.52 and 11,418.32 is: 15,756.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.32 : 28,772.52 = 11,418.32 : x
  2. Step 2: Convert to fraction form
    20,850.32/28,772.52 = 11,418.32/x
  3. Step 3: Cross multiply
    20,850.32x = 28,772.52 × 11,418.32
  4. Step 4: Simplify right side
    20,850.32x = 328,533,840.57
  5. Step 5: Solve for x
    x = 328,533,840.57/20,850.32
  6. Step 6: Final answer
    x = 15,756.78

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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.