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Finding the Fourth Proportional to 35,309.25, 48,731.09 and 20,405.25

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Solution

The fourth proportional to 35,309.25, 48,731.09 and 20,405.25 is: 28,161.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,309.25 : 48,731.09 = 20,405.25 : x
  2. Step 2: Convert to fraction form
    35,309.25/48,731.09 = 20,405.25/x
  3. Step 3: Cross multiply
    35,309.25x = 48,731.09 × 20,405.25
  4. Step 4: Simplify right side
    35,309.25x = 994,369,972.20
  5. Step 5: Solve for x
    x = 994,369,972.20/35,309.25
  6. Step 6: Final answer
    x = 28,161.74

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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.