Home / 20,949.10-31,390.84-12,069.88

Finding the Fourth Proportional to 20,949.10, 31,390.84 and 12,069.88

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Solution

The fourth proportional to 20,949.10, 31,390.84 and 12,069.88 is: 18,085.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.10 : 31,390.84 = 12,069.88 : x
  2. Step 2: Convert to fraction form
    20,949.10/31,390.84 = 12,069.88/x
  3. Step 3: Cross multiply
    20,949.10x = 31,390.84 × 12,069.88
  4. Step 4: Simplify right side
    20,949.10x = 378,883,608.51
  5. Step 5: Solve for x
    x = 378,883,608.51/20,949.10
  6. Step 6: Final answer
    x = 18,085.92

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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.