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Finding the Fourth Proportional to 21,052.80, 28,993.82 and 20,593.53

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Solution

The fourth proportional to 21,052.80, 28,993.82 and 20,593.53 is: 28,361.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,052.80 : 28,993.82 = 20,593.53 : x
  2. Step 2: Convert to fraction form
    21,052.80/28,993.82 = 20,593.53/x
  3. Step 3: Cross multiply
    21,052.80x = 28,993.82 × 20,593.53
  4. Step 4: Simplify right side
    21,052.80x = 597,084,999.02
  5. Step 5: Solve for x
    x = 597,084,999.02/21,052.80
  6. Step 6: Final answer
    x = 28,361.31

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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.