Home / 12,129.12-18,199.91-5,018.64

Finding the Fourth Proportional to 12,129.12, 18,199.91 and 5,018.64

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Solution

The fourth proportional to 12,129.12, 18,199.91 and 5,018.64 is: 7,530.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.12 : 18,199.91 = 5,018.64 : x
  2. Step 2: Convert to fraction form
    12,129.12/18,199.91 = 5,018.64/x
  3. Step 3: Cross multiply
    12,129.12x = 18,199.91 × 5,018.64
  4. Step 4: Simplify right side
    12,129.12x = 91,338,808.87
  5. Step 5: Solve for x
    x = 91,338,808.87/12,129.12
  6. Step 6: Final answer
    x = 7,530.54

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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.