Home / 8,428.87-11,628.43-5,239.90

Finding the Fourth Proportional to 8,428.87, 11,628.43 and 5,239.90

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Solution

The fourth proportional to 8,428.87, 11,628.43 and 5,239.90 is: 7,228.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.87 : 11,628.43 = 5,239.90 : x
  2. Step 2: Convert to fraction form
    8,428.87/11,628.43 = 5,239.90/x
  3. Step 3: Cross multiply
    8,428.87x = 11,628.43 × 5,239.90
  4. Step 4: Simplify right side
    8,428.87x = 60,931,810.36
  5. Step 5: Solve for x
    x = 60,931,810.36/8,428.87
  6. Step 6: Final answer
    x = 7,228.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.