Home / 5,209.40-7,815.47-1,511.97

Finding the Fourth Proportional to 5,209.40, 7,815.47 and 1,511.97

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Solution

The fourth proportional to 5,209.40, 7,815.47 and 1,511.97 is: 2,268.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,209.40 : 7,815.47 = 1,511.97 : x
  2. Step 2: Convert to fraction form
    5,209.40/7,815.47 = 1,511.97/x
  3. Step 3: Cross multiply
    5,209.40x = 7,815.47 × 1,511.97
  4. Step 4: Simplify right side
    5,209.40x = 11,816,748.62
  5. Step 5: Solve for x
    x = 11,816,748.62/5,209.40
  6. Step 6: Final answer
    x = 2,268.35

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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.