Home / 13,221.76-19,834.80-5,428.48

Finding the Fourth Proportional to 13,221.76, 19,834.80 and 5,428.48

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Solution

The fourth proportional to 13,221.76, 19,834.80 and 5,428.48 is: 8,143.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.76 : 19,834.80 = 5,428.48 : x
  2. Step 2: Convert to fraction form
    13,221.76/19,834.80 = 5,428.48/x
  3. Step 3: Cross multiply
    13,221.76x = 19,834.80 × 5,428.48
  4. Step 4: Simplify right side
    13,221.76x = 107,672,815.10
  5. Step 5: Solve for x
    x = 107,672,815.10/13,221.76
  6. Step 6: Final answer
    x = 8,143.61

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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.