Home / 11,979.40-17,966.78-3,657.40

Finding the Fourth Proportional to 11,979.40, 17,966.78 and 3,657.40

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Solution

The fourth proportional to 11,979.40, 17,966.78 and 3,657.40 is: 5,485.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,979.40 : 17,966.78 = 3,657.40 : x
  2. Step 2: Convert to fraction form
    11,979.40/17,966.78 = 3,657.40/x
  3. Step 3: Cross multiply
    11,979.40x = 17,966.78 × 3,657.40
  4. Step 4: Simplify right side
    11,979.40x = 65,711,701.17
  5. Step 5: Solve for x
    x = 65,711,701.17/11,979.40
  6. Step 6: Final answer
    x = 5,485.39

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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.