Home / 5,420.42-8,115.96-2,817.89

Finding the Fourth Proportional to 5,420.42, 8,115.96 and 2,817.89

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Solution

The fourth proportional to 5,420.42, 8,115.96 and 2,817.89 is: 4,219.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.42 : 8,115.96 = 2,817.89 : x
  2. Step 2: Convert to fraction form
    5,420.42/8,115.96 = 2,817.89/x
  3. Step 3: Cross multiply
    5,420.42x = 8,115.96 × 2,817.89
  4. Step 4: Simplify right side
    5,420.42x = 22,869,882.52
  5. Step 5: Solve for x
    x = 22,869,882.52/5,420.42
  6. Step 6: Final answer
    x = 4,219.21

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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.