Home / 20,375.52-28,112.06-12,829.32

Finding the Fourth Proportional to 20,375.52, 28,112.06 and 12,829.32

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Solution

The fourth proportional to 20,375.52, 28,112.06 and 12,829.32 is: 17,700.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,375.52 : 28,112.06 = 12,829.32 : x
  2. Step 2: Convert to fraction form
    20,375.52/28,112.06 = 12,829.32/x
  3. Step 3: Cross multiply
    20,375.52x = 28,112.06 × 12,829.32
  4. Step 4: Simplify right side
    20,375.52x = 360,658,645.67
  5. Step 5: Solve for x
    x = 360,658,645.67/20,375.52
  6. Step 6: Final answer
    x = 17,700.59

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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.