Home / 11,979.51-17,966.22-7,821.78

Finding the Fourth Proportional to 11,979.51, 17,966.22 and 7,821.78

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Solution

The fourth proportional to 11,979.51, 17,966.22 and 7,821.78 is: 11,730.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,979.51 : 17,966.22 = 7,821.78 : x
  2. Step 2: Convert to fraction form
    11,979.51/17,966.22 = 7,821.78/x
  3. Step 3: Cross multiply
    11,979.51x = 17,966.22 × 7,821.78
  4. Step 4: Simplify right side
    11,979.51x = 140,527,820.27
  5. Step 5: Solve for x
    x = 140,527,820.27/11,979.51
  6. Step 6: Final answer
    x = 11,730.68

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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.