Home / 5,420.77-8,131.69-1,472.09

Finding the Fourth Proportional to 5,420.77, 8,131.69 and 1,472.09

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Solution

The fourth proportional to 5,420.77, 8,131.69 and 1,472.09 is: 2,208.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.77 : 8,131.69 = 1,472.09 : x
  2. Step 2: Convert to fraction form
    5,420.77/8,131.69 = 1,472.09/x
  3. Step 3: Cross multiply
    5,420.77x = 8,131.69 × 1,472.09
  4. Step 4: Simplify right side
    5,420.77x = 11,970,579.53
  5. Step 5: Solve for x
    x = 11,970,579.53/5,420.77
  6. Step 6: Final answer
    x = 2,208.28

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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.