Home / 21,831.66-30,103.85-14,745.78

Finding the Fourth Proportional to 21,831.66, 30,103.85 and 14,745.78

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Solution

The fourth proportional to 21,831.66, 30,103.85 and 14,745.78 is: 20,333.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,831.66 : 30,103.85 = 14,745.78 : x
  2. Step 2: Convert to fraction form
    21,831.66/30,103.85 = 14,745.78/x
  3. Step 3: Cross multiply
    21,831.66x = 30,103.85 × 14,745.78
  4. Step 4: Simplify right side
    21,831.66x = 443,904,786.12
  5. Step 5: Solve for x
    x = 443,904,786.12/21,831.66
  6. Step 6: Final answer
    x = 20,333.08

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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.