Home / 5,420.28-8,130.81-2,649.26

Finding the Fourth Proportional to 5,420.28, 8,130.81 and 2,649.26

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Solution

The fourth proportional to 5,420.28, 8,130.81 and 2,649.26 is: 3,974.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.28 : 8,130.81 = 2,649.26 : x
  2. Step 2: Convert to fraction form
    5,420.28/8,130.81 = 2,649.26/x
  3. Step 3: Cross multiply
    5,420.28x = 8,130.81 × 2,649.26
  4. Step 4: Simplify right side
    5,420.28x = 21,540,629.70
  5. Step 5: Solve for x
    x = 21,540,629.70/5,420.28
  6. Step 6: Final answer
    x = 3,974.08

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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.