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Finding the Fourth Proportional to 30,283.57, 41,755.57 and 20,728.07

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Solution

The fourth proportional to 30,283.57, 41,755.57 and 20,728.07 is: 28,580.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,283.57 : 41,755.57 = 20,728.07 : x
  2. Step 2: Convert to fraction form
    30,283.57/41,755.57 = 20,728.07/x
  3. Step 3: Cross multiply
    30,283.57x = 41,755.57 × 20,728.07
  4. Step 4: Simplify right side
    30,283.57x = 865,512,274.21
  5. Step 5: Solve for x
    x = 865,512,274.21/30,283.57
  6. Step 6: Final answer
    x = 28,580.26

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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.