Home / 13,205.20-19,815.60-4,891.12

Finding the Fourth Proportional to 13,205.20, 19,815.60 and 4,891.12

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Solution

The fourth proportional to 13,205.20, 19,815.60 and 4,891.12 is: 7,339.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,205.20 : 19,815.60 = 4,891.12 : x
  2. Step 2: Convert to fraction form
    13,205.20/19,815.60 = 4,891.12/x
  3. Step 3: Cross multiply
    13,205.20x = 19,815.60 × 4,891.12
  4. Step 4: Simplify right side
    13,205.20x = 96,920,477.47
  5. Step 5: Solve for x
    x = 96,920,477.47/13,205.20
  6. Step 6: Final answer
    x = 7,339.57

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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.