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Finding the Fourth Proportional to 35,490.54, 48,971.70 and 20,383.86

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Solution

The fourth proportional to 35,490.54, 48,971.70 and 20,383.86 is: 28,126.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,490.54 : 48,971.70 = 20,383.86 : x
  2. Step 2: Convert to fraction form
    35,490.54/48,971.70 = 20,383.86/x
  3. Step 3: Cross multiply
    35,490.54x = 48,971.70 × 20,383.86
  4. Step 4: Simplify right side
    35,490.54x = 998,232,276.76
  5. Step 5: Solve for x
    x = 998,232,276.76/35,490.54
  6. Step 6: Final answer
    x = 28,126.71

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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.