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Finding the Fourth Proportional to 28,980.88, 39,993.78 and 17,044.72

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Solution

The fourth proportional to 28,980.88, 39,993.78 and 17,044.72 is: 23,521.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,980.88 : 39,993.78 = 17,044.72 : x
  2. Step 2: Convert to fraction form
    28,980.88/39,993.78 = 17,044.72/x
  3. Step 3: Cross multiply
    28,980.88x = 39,993.78 × 17,044.72
  4. Step 4: Simplify right side
    28,980.88x = 681,682,781.84
  5. Step 5: Solve for x
    x = 681,682,781.84/28,980.88
  6. Step 6: Final answer
    x = 23,521.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.