Home / 18,879.20-28,428.56-13,983.52

Finding the Fourth Proportional to 18,879.20, 28,428.56 and 13,983.52

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Solution

The fourth proportional to 18,879.20, 28,428.56 and 13,983.52 is: 21,056.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.20 : 28,428.56 = 13,983.52 : x
  2. Step 2: Convert to fraction form
    18,879.20/28,428.56 = 13,983.52/x
  3. Step 3: Cross multiply
    18,879.20x = 28,428.56 × 13,983.52
  4. Step 4: Simplify right side
    18,879.20x = 397,531,337.33
  5. Step 5: Solve for x
    x = 397,531,337.33/18,879.20
  6. Step 6: Final answer
    x = 21,056.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.