Home / 9,120.34-13,679.32-3,857.43

Finding the Fourth Proportional to 9,120.34, 13,679.32 and 3,857.43

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Solution

The fourth proportional to 9,120.34, 13,679.32 and 3,857.43 is: 5,785.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.34 : 13,679.32 = 3,857.43 : x
  2. Step 2: Convert to fraction form
    9,120.34/13,679.32 = 3,857.43/x
  3. Step 3: Cross multiply
    9,120.34x = 13,679.32 × 3,857.43
  4. Step 4: Simplify right side
    9,120.34x = 52,767,019.35
  5. Step 5: Solve for x
    x = 52,767,019.35/9,120.34
  6. Step 6: Final answer
    x = 5,785.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.