Home / 20,728.76-28,610.30-13,173.62

Finding the Fourth Proportional to 20,728.76, 28,610.30 and 13,173.62

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Solution

The fourth proportional to 20,728.76, 28,610.30 and 13,173.62 is: 18,182.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.76 : 28,610.30 = 13,173.62 : x
  2. Step 2: Convert to fraction form
    20,728.76/28,610.30 = 13,173.62/x
  3. Step 3: Cross multiply
    20,728.76x = 28,610.30 × 13,173.62
  4. Step 4: Simplify right side
    20,728.76x = 376,901,110.17
  5. Step 5: Solve for x
    x = 376,901,110.17/20,728.76
  6. Step 6: Final answer
    x = 18,182.52

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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.