Home / 18,942.58-28,407.71-8,945.78

Finding the Fourth Proportional to 18,942.58, 28,407.71 and 8,945.78

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Solution

The fourth proportional to 18,942.58, 28,407.71 and 8,945.78 is: 13,415.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,942.58 : 28,407.71 = 8,945.78 : x
  2. Step 2: Convert to fraction form
    18,942.58/28,407.71 = 8,945.78/x
  3. Step 3: Cross multiply
    18,942.58x = 28,407.71 × 8,945.78
  4. Step 4: Simplify right side
    18,942.58x = 254,128,981.93
  5. Step 5: Solve for x
    x = 254,128,981.93/18,942.58
  6. Step 6: Final answer
    x = 13,415.75

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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.