Home / 5,427.81-8,136.18-2,139.08

Finding the Fourth Proportional to 5,427.81, 8,136.18 and 2,139.08

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Solution

The fourth proportional to 5,427.81, 8,136.18 and 2,139.08 is: 3,206.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,427.81 : 8,136.18 = 2,139.08 : x
  2. Step 2: Convert to fraction form
    5,427.81/8,136.18 = 2,139.08/x
  3. Step 3: Cross multiply
    5,427.81x = 8,136.18 × 2,139.08
  4. Step 4: Simplify right side
    5,427.81x = 17,403,899.23
  5. Step 5: Solve for x
    x = 17,403,899.23/5,427.81
  6. Step 6: Final answer
    x = 3,206.43

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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.