Home / 13,638.96-18,822.75-8,334.79

Finding the Fourth Proportional to 13,638.96, 18,822.75 and 8,334.79

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Solution

The fourth proportional to 13,638.96, 18,822.75 and 8,334.79 is: 11,502.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.96 : 18,822.75 = 8,334.79 : x
  2. Step 2: Convert to fraction form
    13,638.96/18,822.75 = 8,334.79/x
  3. Step 3: Cross multiply
    13,638.96x = 18,822.75 × 8,334.79
  4. Step 4: Simplify right side
    13,638.96x = 156,883,668.47
  5. Step 5: Solve for x
    x = 156,883,668.47/13,638.96
  6. Step 6: Final answer
    x = 11,502.61

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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.