Home / 20,383.21-28,122.10-12,313.84

Finding the Fourth Proportional to 20,383.21, 28,122.10 and 12,313.84

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Solution

The fourth proportional to 20,383.21, 28,122.10 and 12,313.84 is: 16,989.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.21 : 28,122.10 = 12,313.84 : x
  2. Step 2: Convert to fraction form
    20,383.21/28,122.10 = 12,313.84/x
  3. Step 3: Cross multiply
    20,383.21x = 28,122.10 × 12,313.84
  4. Step 4: Simplify right side
    20,383.21x = 346,291,039.86
  5. Step 5: Solve for x
    x = 346,291,039.86/20,383.21
  6. Step 6: Final answer
    x = 16,989.03

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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.