Home / 5,427.70-8,137.90-2,139.10

Finding the Fourth Proportional to 5,427.70, 8,137.90 and 2,139.10

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Solution

The fourth proportional to 5,427.70, 8,137.90 and 2,139.10 is: 3,207.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,427.70 : 8,137.90 = 2,139.10 : x
  2. Step 2: Convert to fraction form
    5,427.70/8,137.90 = 2,139.10/x
  3. Step 3: Cross multiply
    5,427.70x = 8,137.90 × 2,139.10
  4. Step 4: Simplify right side
    5,427.70x = 17,407,781.89
  5. Step 5: Solve for x
    x = 17,407,781.89/5,427.70
  6. Step 6: Final answer
    x = 3,207.21

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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.