Home / 12,622.15-18,905.86-9,151.75

Finding the Fourth Proportional to 12,622.15, 18,905.86 and 9,151.75

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Solution

The fourth proportional to 12,622.15, 18,905.86 and 9,151.75 is: 13,707.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,622.15 : 18,905.86 = 9,151.75 : x
  2. Step 2: Convert to fraction form
    12,622.15/18,905.86 = 9,151.75/x
  3. Step 3: Cross multiply
    12,622.15x = 18,905.86 × 9,151.75
  4. Step 4: Simplify right side
    12,622.15x = 173,021,704.26
  5. Step 5: Solve for x
    x = 173,021,704.26/12,622.15
  6. Step 6: Final answer
    x = 13,707.78

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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.