Home / 7,880.40-11,827.83-3,987.54

Finding the Fourth Proportional to 7,880.40, 11,827.83 and 3,987.54

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Solution

The fourth proportional to 7,880.40, 11,827.83 and 3,987.54 is: 5,984.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,880.40 : 11,827.83 = 3,987.54 : x
  2. Step 2: Convert to fraction form
    7,880.40/11,827.83 = 3,987.54/x
  3. Step 3: Cross multiply
    7,880.40x = 11,827.83 × 3,987.54
  4. Step 4: Simplify right side
    7,880.40x = 47,163,945.24
  5. Step 5: Solve for x
    x = 47,163,945.24/7,880.40
  6. Step 6: Final answer
    x = 5,984.97

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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.