Home / 20,999.94-31,346.24-18,508.86

Finding the Fourth Proportional to 20,999.94, 31,346.24 and 18,508.86

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Solution

The fourth proportional to 20,999.94, 31,346.24 and 18,508.86 is: 27,627.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.94 : 31,346.24 = 18,508.86 : x
  2. Step 2: Convert to fraction form
    20,999.94/31,346.24 = 18,508.86/x
  3. Step 3: Cross multiply
    20,999.94x = 31,346.24 × 18,508.86
  4. Step 4: Simplify right side
    20,999.94x = 580,183,075.14
  5. Step 5: Solve for x
    x = 580,183,075.14/20,999.94
  6. Step 6: Final answer
    x = 27,627.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.