Home / 12,639.24-18,958.86-5,238.68

Finding the Fourth Proportional to 12,639.24, 18,958.86 and 5,238.68

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Solution

The fourth proportional to 12,639.24, 18,958.86 and 5,238.68 is: 7,858.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.24 : 18,958.86 = 5,238.68 : x
  2. Step 2: Convert to fraction form
    12,639.24/18,958.86 = 5,238.68/x
  3. Step 3: Cross multiply
    12,639.24x = 18,958.86 × 5,238.68
  4. Step 4: Simplify right side
    12,639.24x = 99,319,305.91
  5. Step 5: Solve for x
    x = 99,319,305.91/12,639.24
  6. Step 6: Final answer
    x = 7,858.01

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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.