Home / 5,415.96-8,118.93-2,129.07

Finding the Fourth Proportional to 5,415.96, 8,118.93 and 2,129.07

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Solution

The fourth proportional to 5,415.96, 8,118.93 and 2,129.07 is: 3,191.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.96 : 8,118.93 = 2,129.07 : x
  2. Step 2: Convert to fraction form
    5,415.96/8,118.93 = 2,129.07/x
  3. Step 3: Cross multiply
    5,415.96x = 8,118.93 × 2,129.07
  4. Step 4: Simplify right side
    5,415.96x = 17,285,770.30
  5. Step 5: Solve for x
    x = 17,285,770.30/5,415.96
  6. Step 6: Final answer
    x = 3,191.64

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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.