Home / 13,629.08-20,383.98-12,632.78

Finding the Fourth Proportional to 13,629.08, 20,383.98 and 12,632.78

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Solution

The fourth proportional to 13,629.08, 20,383.98 and 12,632.78 is: 18,893.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,629.08 : 20,383.98 = 12,632.78 : x
  2. Step 2: Convert to fraction form
    13,629.08/20,383.98 = 12,632.78/x
  3. Step 3: Cross multiply
    13,629.08x = 20,383.98 × 12,632.78
  4. Step 4: Simplify right side
    13,629.08x = 257,506,334.86
  5. Step 5: Solve for x
    x = 257,506,334.86/13,629.08
  6. Step 6: Final answer
    x = 18,893.89

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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.