Home / 12,831.08-19,249.86-5,431.76

Finding the Fourth Proportional to 12,831.08, 19,249.86 and 5,431.76

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Solution

The fourth proportional to 12,831.08, 19,249.86 and 5,431.76 is: 8,149.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,831.08 : 19,249.86 = 5,431.76 : x
  2. Step 2: Convert to fraction form
    12,831.08/19,249.86 = 5,431.76/x
  3. Step 3: Cross multiply
    12,831.08x = 19,249.86 × 5,431.76
  4. Step 4: Simplify right side
    12,831.08x = 104,560,619.55
  5. Step 5: Solve for x
    x = 104,560,619.55/12,831.08
  6. Step 6: Final answer
    x = 8,149.01

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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.