Home / 5,400.90-8,100.13-1,938.15

Finding the Fourth Proportional to 5,400.90, 8,100.13 and 1,938.15

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Solution

The fourth proportional to 5,400.90, 8,100.13 and 1,938.15 is: 2,906.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,400.90 : 8,100.13 = 1,938.15 : x
  2. Step 2: Convert to fraction form
    5,400.90/8,100.13 = 1,938.15/x
  3. Step 3: Cross multiply
    5,400.90x = 8,100.13 × 1,938.15
  4. Step 4: Simplify right side
    5,400.90x = 15,699,231.74
  5. Step 5: Solve for x
    x = 15,699,231.74/5,400.90
  6. Step 6: Final answer
    x = 2,906.78

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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.