Home / 20,619.26-30,889.08-12,305.91

Finding the Fourth Proportional to 20,619.26, 30,889.08 and 12,305.91

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Solution

The fourth proportional to 20,619.26, 30,889.08 and 12,305.91 is: 18,435.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.26 : 30,889.08 = 12,305.91 : x
  2. Step 2: Convert to fraction form
    20,619.26/30,889.08 = 12,305.91/x
  3. Step 3: Cross multiply
    20,619.26x = 30,889.08 × 12,305.91
  4. Step 4: Simplify right side
    20,619.26x = 380,118,238.46
  5. Step 5: Solve for x
    x = 380,118,238.46/20,619.26
  6. Step 6: Final answer
    x = 18,435.11

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1.5x scale

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.