Home / 5,427.58-8,135.90-2,139.40

Finding the Fourth Proportional to 5,427.58, 8,135.90 and 2,139.40

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Solution

The fourth proportional to 5,427.58, 8,135.90 and 2,139.40 is: 3,206.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,427.58 : 8,135.90 = 2,139.40 : x
  2. Step 2: Convert to fraction form
    5,427.58/8,135.90 = 2,139.40/x
  3. Step 3: Cross multiply
    5,427.58x = 8,135.90 × 2,139.40
  4. Step 4: Simplify right side
    5,427.58x = 17,405,944.46
  5. Step 5: Solve for x
    x = 17,405,944.46/5,427.58
  6. Step 6: Final answer
    x = 3,206.94

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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.