Home / 5,420.25-8,131.79-2,300.40

Finding the Fourth Proportional to 5,420.25, 8,131.79 and 2,300.40

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Solution

The fourth proportional to 5,420.25, 8,131.79 and 2,300.40 is: 3,451.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.25 : 8,131.79 = 2,300.40 : x
  2. Step 2: Convert to fraction form
    5,420.25/8,131.79 = 2,300.40/x
  3. Step 3: Cross multiply
    5,420.25x = 8,131.79 × 2,300.40
  4. Step 4: Simplify right side
    5,420.25x = 18,706,369.72
  5. Step 5: Solve for x
    x = 18,706,369.72/5,420.25
  6. Step 6: Final answer
    x = 3,451.20

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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.