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Finding the Fourth Proportional to 28,163.86, 38,863.50 and 16,831.12

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Solution

The fourth proportional to 28,163.86, 38,863.50 and 16,831.12 is: 23,225.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,163.86 : 38,863.50 = 16,831.12 : x
  2. Step 2: Convert to fraction form
    28,163.86/38,863.50 = 16,831.12/x
  3. Step 3: Cross multiply
    28,163.86x = 38,863.50 × 16,831.12
  4. Step 4: Simplify right side
    28,163.86x = 654,116,232.12
  5. Step 5: Solve for x
    x = 654,116,232.12/28,163.86
  6. Step 6: Final answer
    x = 23,225.38

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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.