Home / 13,138.32-18,131.16-7,472.88

Finding the Fourth Proportional to 13,138.32, 18,131.16 and 7,472.88

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Solution

The fourth proportional to 13,138.32, 18,131.16 and 7,472.88 is: 10,312.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.32 : 18,131.16 = 7,472.88 : x
  2. Step 2: Convert to fraction form
    13,138.32/18,131.16 = 7,472.88/x
  3. Step 3: Cross multiply
    13,138.32x = 18,131.16 × 7,472.88
  4. Step 4: Simplify right side
    13,138.32x = 135,491,982.94
  5. Step 5: Solve for x
    x = 135,491,982.94/13,138.32
  6. Step 6: Final answer
    x = 10,312.73

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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.