Home / 5,418.95-8,129.96-1,909.84

Finding the Fourth Proportional to 5,418.95, 8,129.96 and 1,909.84

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Solution

The fourth proportional to 5,418.95, 8,129.96 and 1,909.84 is: 2,865.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.95 : 8,129.96 = 1,909.84 : x
  2. Step 2: Convert to fraction form
    5,418.95/8,129.96 = 1,909.84/x
  3. Step 3: Cross multiply
    5,418.95x = 8,129.96 × 1,909.84
  4. Step 4: Simplify right side
    5,418.95x = 15,526,922.81
  5. Step 5: Solve for x
    x = 15,526,922.81/5,418.95
  6. Step 6: Final answer
    x = 2,865.30

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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.