Home / 20,520.24-28,314.36-12,133.68

Finding the Fourth Proportional to 20,520.24, 28,314.36 and 12,133.68

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Solution

The fourth proportional to 20,520.24, 28,314.36 and 12,133.68 is: 16,742.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.24 : 28,314.36 = 12,133.68 : x
  2. Step 2: Convert to fraction form
    20,520.24/28,314.36 = 12,133.68/x
  3. Step 3: Cross multiply
    20,520.24x = 28,314.36 × 12,133.68
  4. Step 4: Simplify right side
    20,520.24x = 343,557,383.64
  5. Step 5: Solve for x
    x = 343,557,383.64/20,520.24
  6. Step 6: Final answer
    x = 16,742.37

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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.