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Finding the Fourth Proportional to 28,571.70, 39,428.92 and 17,393.70

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Solution

The fourth proportional to 28,571.70, 39,428.92 and 17,393.70 is: 24,003.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,571.70 : 39,428.92 = 17,393.70 : x
  2. Step 2: Convert to fraction form
    28,571.70/39,428.92 = 17,393.70/x
  3. Step 3: Cross multiply
    28,571.70x = 39,428.92 × 17,393.70
  4. Step 4: Simplify right side
    28,571.70x = 685,814,805.80
  5. Step 5: Solve for x
    x = 685,814,805.80/28,571.70
  6. Step 6: Final answer
    x = 24,003.29

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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.