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Finding the Fourth Proportional to 35,399.78, 48,854.85 and 20,297.78

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Solution

The fourth proportional to 35,399.78, 48,854.85 and 20,297.78 is: 28,012.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,399.78 : 48,854.85 = 20,297.78 : x
  2. Step 2: Convert to fraction form
    35,399.78/48,854.85 = 20,297.78/x
  3. Step 3: Cross multiply
    35,399.78x = 48,854.85 × 20,297.78
  4. Step 4: Simplify right side
    35,399.78x = 991,644,997.23
  5. Step 5: Solve for x
    x = 991,644,997.23/35,399.78
  6. Step 6: Final answer
    x = 28,012.74

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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.