Home / 3,699.18-5,538.87-2,131.20

Finding the Fourth Proportional to 3,699.18, 5,538.87 and 2,131.20

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Solution

The fourth proportional to 3,699.18, 5,538.87 and 2,131.20 is: 3,191.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,699.18 : 5,538.87 = 2,131.20 : x
  2. Step 2: Convert to fraction form
    3,699.18/5,538.87 = 2,131.20/x
  3. Step 3: Cross multiply
    3,699.18x = 5,538.87 × 2,131.20
  4. Step 4: Simplify right side
    3,699.18x = 11,804,439.74
  5. Step 5: Solve for x
    x = 11,804,439.74/3,699.18
  6. Step 6: Final answer
    x = 3,191.10

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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.