Home / 5,420.12-8,130.78-2,132.78

Finding the Fourth Proportional to 5,420.12, 8,130.78 and 2,132.78

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Solution

The fourth proportional to 5,420.12, 8,130.78 and 2,132.78 is: 3,199.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.12 : 8,130.78 = 2,132.78 : x
  2. Step 2: Convert to fraction form
    5,420.12/8,130.78 = 2,132.78/x
  3. Step 3: Cross multiply
    5,420.12x = 8,130.78 × 2,132.78
  4. Step 4: Simplify right side
    5,420.12x = 17,341,164.97
  5. Step 5: Solve for x
    x = 17,341,164.97/5,420.12
  6. Step 6: Final answer
    x = 3,199.41

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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.