Home / 19,140.12-28,706.94-5,289.12

Finding the Fourth Proportional to 19,140.12, 28,706.94 and 5,289.12

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Solution

The fourth proportional to 19,140.12, 28,706.94 and 5,289.12 is: 7,932.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,140.12 : 28,706.94 = 5,289.12 : x
  2. Step 2: Convert to fraction form
    19,140.12/28,706.94 = 5,289.12/x
  3. Step 3: Cross multiply
    19,140.12x = 28,706.94 × 5,289.12
  4. Step 4: Simplify right side
    19,140.12x = 151,834,450.49
  5. Step 5: Solve for x
    x = 151,834,450.49/19,140.12
  6. Step 6: Final answer
    x = 7,932.78

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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.