Home / 20,838.12-31,230.02-18,199.37

Finding the Fourth Proportional to 20,838.12, 31,230.02 and 18,199.37

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Solution

The fourth proportional to 20,838.12, 31,230.02 and 18,199.37 is: 27,275.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.12 : 31,230.02 = 18,199.37 : x
  2. Step 2: Convert to fraction form
    20,838.12/31,230.02 = 18,199.37/x
  3. Step 3: Cross multiply
    20,838.12x = 31,230.02 × 18,199.37
  4. Step 4: Simplify right side
    20,838.12x = 568,366,441.94
  5. Step 5: Solve for x
    x = 568,366,441.94/20,838.12
  6. Step 6: Final answer
    x = 27,275.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.