Home / 13,125.25-18,112.85-8,415.91

Finding the Fourth Proportional to 13,125.25, 18,112.85 and 8,415.91

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Solution

The fourth proportional to 13,125.25, 18,112.85 and 8,415.91 is: 11,613.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.25 : 18,112.85 = 8,415.91 : x
  2. Step 2: Convert to fraction form
    13,125.25/18,112.85 = 8,415.91/x
  3. Step 3: Cross multiply
    13,125.25x = 18,112.85 × 8,415.91
  4. Step 4: Simplify right side
    13,125.25x = 152,436,115.44
  5. Step 5: Solve for x
    x = 152,436,115.44/13,125.25
  6. Step 6: Final answer
    x = 11,613.96

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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.