Home / 5,428.81-8,137.68-2,140.08

Finding the Fourth Proportional to 5,428.81, 8,137.68 and 2,140.08

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Solution

The fourth proportional to 5,428.81, 8,137.68 and 2,140.08 is: 3,207.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.81 : 8,137.68 = 2,140.08 : x
  2. Step 2: Convert to fraction form
    5,428.81/8,137.68 = 2,140.08/x
  3. Step 3: Cross multiply
    5,428.81x = 8,137.68 × 2,140.08
  4. Step 4: Simplify right side
    5,428.81x = 17,415,286.21
  5. Step 5: Solve for x
    x = 17,415,286.21/5,428.81
  6. Step 6: Final answer
    x = 3,207.94

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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.