Home / 13,228.78-19,838.17-5,328.61

Finding the Fourth Proportional to 13,228.78, 19,838.17 and 5,328.61

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Solution

The fourth proportional to 13,228.78, 19,838.17 and 5,328.61 is: 7,990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,228.78 : 19,838.17 = 5,328.61 : x
  2. Step 2: Convert to fraction form
    13,228.78/19,838.17 = 5,328.61/x
  3. Step 3: Cross multiply
    13,228.78x = 19,838.17 × 5,328.61
  4. Step 4: Simplify right side
    13,228.78x = 105,709,909.73
  5. Step 5: Solve for x
    x = 105,709,909.73/13,228.78
  6. Step 6: Final answer
    x = 7,990.90

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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.