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Finding the Fourth Proportional to 35,279.94, 48,690.81 and 20,375.94

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Solution

The fourth proportional to 35,279.94, 48,690.81 and 20,375.94 is: 28,121.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,279.94 : 48,690.81 = 20,375.94 : x
  2. Step 2: Convert to fraction form
    35,279.94/48,690.81 = 20,375.94/x
  3. Step 3: Cross multiply
    35,279.94x = 48,690.81 × 20,375.94
  4. Step 4: Simplify right side
    35,279.94x = 992,121,023.11
  5. Step 5: Solve for x
    x = 992,121,023.11/35,279.94
  6. Step 6: Final answer
    x = 28,121.39

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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.