Home / 20,619.24-28,448-12,118.64

Finding the Fourth Proportional to 20,619.24, 28,448 and 12,118.64

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Solution

The fourth proportional to 20,619.24, 28,448 and 12,118.64 is: 16,719.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.24 : 28,448 = 12,118.64 : x
  2. Step 2: Convert to fraction form
    20,619.24/28,448 = 12,118.64/x
  3. Step 3: Cross multiply
    20,619.24x = 28,448 × 12,118.64
  4. Step 4: Simplify right side
    20,619.24x = 344,751,070.72
  5. Step 5: Solve for x
    x = 344,751,070.72/20,619.24
  6. Step 6: Final answer
    x = 16,719.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.