Home / 20,530.60-28,334.82-11,578.60

Finding the Fourth Proportional to 20,530.60, 28,334.82 and 11,578.60

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Solution

The fourth proportional to 20,530.60, 28,334.82 and 11,578.60 is: 15,979.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.60 : 28,334.82 = 11,578.60 : x
  2. Step 2: Convert to fraction form
    20,530.60/28,334.82 = 11,578.60/x
  3. Step 3: Cross multiply
    20,530.60x = 28,334.82 × 11,578.60
  4. Step 4: Simplify right side
    20,530.60x = 328,077,546.85
  5. Step 5: Solve for x
    x = 328,077,546.85/20,530.60
  6. Step 6: Final answer
    x = 15,979.93

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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.