Home / 13,513.18-18,638.52-11,717.44

Finding the Fourth Proportional to 13,513.18, 18,638.52 and 11,717.44

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Solution

The fourth proportional to 13,513.18, 18,638.52 and 11,717.44 is: 16,161.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,513.18 : 18,638.52 = 11,717.44 : x
  2. Step 2: Convert to fraction form
    13,513.18/18,638.52 = 11,717.44/x
  3. Step 3: Cross multiply
    13,513.18x = 18,638.52 × 11,717.44
  4. Step 4: Simplify right side
    13,513.18x = 218,395,739.79
  5. Step 5: Solve for x
    x = 218,395,739.79/13,513.18
  6. Step 6: Final answer
    x = 16,161.68

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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.