Home / 35,680.91-53,521.49-11,987.78

Finding the Fourth Proportional to 35,680.91, 53,521.49 and 11,987.78

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Solution

The fourth proportional to 35,680.91, 53,521.49 and 11,987.78 is: 17,981.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,680.91 : 53,521.49 = 11,987.78 : x
  2. Step 2: Convert to fraction form
    35,680.91/53,521.49 = 11,987.78/x
  3. Step 3: Cross multiply
    35,680.91x = 53,521.49 × 11,987.78
  4. Step 4: Simplify right side
    35,680.91x = 641,603,847.39
  5. Step 5: Solve for x
    x = 641,603,847.39/35,680.91
  6. Step 6: Final answer
    x = 17,981.71

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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.