Home / 13,813.61-20,721.76-5,491.76

Finding the Fourth Proportional to 13,813.61, 20,721.76 and 5,491.76

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Solution

The fourth proportional to 13,813.61, 20,721.76 and 5,491.76 is: 8,238.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,813.61 : 20,721.76 = 5,491.76 : x
  2. Step 2: Convert to fraction form
    13,813.61/20,721.76 = 5,491.76/x
  3. Step 3: Cross multiply
    13,813.61x = 20,721.76 × 5,491.76
  4. Step 4: Simplify right side
    13,813.61x = 113,798,815.36
  5. Step 5: Solve for x
    x = 113,798,815.36/13,813.61
  6. Step 6: Final answer
    x = 8,238.17

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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.