Home / 13,405.91-18,497.09-8,100.60

Finding the Fourth Proportional to 13,405.91, 18,497.09 and 8,100.60

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Solution

The fourth proportional to 13,405.91, 18,497.09 and 8,100.60 is: 11,176.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.91 : 18,497.09 = 8,100.60 : x
  2. Step 2: Convert to fraction form
    13,405.91/18,497.09 = 8,100.60/x
  3. Step 3: Cross multiply
    13,405.91x = 18,497.09 × 8,100.60
  4. Step 4: Simplify right side
    13,405.91x = 149,837,486.75
  5. Step 5: Solve for x
    x = 149,837,486.75/13,405.91
  6. Step 6: Final answer
    x = 11,176.98

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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.