Home / 5,428.69-8,137.50-2,140.45

Finding the Fourth Proportional to 5,428.69, 8,137.50 and 2,140.45

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Solution

The fourth proportional to 5,428.69, 8,137.50 and 2,140.45 is: 3,208.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.69 : 8,137.50 = 2,140.45 : x
  2. Step 2: Convert to fraction form
    5,428.69/8,137.50 = 2,140.45/x
  3. Step 3: Cross multiply
    5,428.69x = 8,137.50 × 2,140.45
  4. Step 4: Simplify right side
    5,428.69x = 17,417,911.88
  5. Step 5: Solve for x
    x = 17,417,911.88/5,428.69
  6. Step 6: Final answer
    x = 3,208.49

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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.