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Finding the Fourth Proportional to 7,876.13, 11,815.81 and 3,259.13

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Solution

The fourth proportional to 7,876.13, 11,815.81 and 3,259.13 is: 4,889.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,876.13 : 11,815.81 = 3,259.13 : x
  2. Step 2: Convert to fraction form
    7,876.13/11,815.81 = 3,259.13/x
  3. Step 3: Cross multiply
    7,876.13x = 11,815.81 × 3,259.13
  4. Step 4: Simplify right side
    7,876.13x = 38,509,193.62
  5. Step 5: Solve for x
    x = 38,509,193.62/7,876.13
  6. Step 6: Final answer
    x = 4,889.36

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1.5x scale

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.