Home / 5,420.26-8,127.10-2,129.41

Finding the Fourth Proportional to 5,420.26, 8,127.10 and 2,129.41

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Solution

The fourth proportional to 5,420.26, 8,127.10 and 2,129.41 is: 3,192.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.26 : 8,127.10 = 2,129.41 : x
  2. Step 2: Convert to fraction form
    5,420.26/8,127.10 = 2,129.41/x
  3. Step 3: Cross multiply
    5,420.26x = 8,127.10 × 2,129.41
  4. Step 4: Simplify right side
    5,420.26x = 17,305,928.01
  5. Step 5: Solve for x
    x = 17,305,928.01/5,420.26
  6. Step 6: Final answer
    x = 3,192.82

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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.