Home / 13,137.39-18,128.00-7,472.86

Finding the Fourth Proportional to 13,137.39, 18,128.00 and 7,472.86

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Solution

The fourth proportional to 13,137.39, 18,128.00 and 7,472.86 is: 10,311.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.39 : 18,128.00 = 7,472.86 : x
  2. Step 2: Convert to fraction form
    13,137.39/18,128.00 = 7,472.86/x
  3. Step 3: Cross multiply
    13,137.39x = 18,128.00 × 7,472.86
  4. Step 4: Simplify right side
    13,137.39x = 135,467,979.44
  5. Step 5: Solve for x
    x = 135,467,979.44/13,137.39
  6. Step 6: Final answer
    x = 10,311.64

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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.