Home / 13,138.39-18,129.38-7,473.86

Finding the Fourth Proportional to 13,138.39, 18,129.38 and 7,473.86

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Solution

The fourth proportional to 13,138.39, 18,129.38 and 7,473.86 is: 10,313.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.39 : 18,129.38 = 7,473.86 : x
  2. Step 2: Convert to fraction form
    13,138.39/18,129.38 = 7,473.86/x
  3. Step 3: Cross multiply
    13,138.39x = 18,129.38 × 7,473.86
  4. Step 4: Simplify right side
    13,138.39x = 135,496,448.01
  5. Step 5: Solve for x
    x = 135,496,448.01/13,138.39
  6. Step 6: Final answer
    x = 10,313.02

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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.