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Finding the Fourth Proportional to 35,415.86, 48,874.07 and 20,309.09

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Solution

The fourth proportional to 35,415.86, 48,874.07 and 20,309.09 is: 28,026.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,415.86 : 48,874.07 = 20,309.09 : x
  2. Step 2: Convert to fraction form
    35,415.86/48,874.07 = 20,309.09/x
  3. Step 3: Cross multiply
    35,415.86x = 48,874.07 × 20,309.09
  4. Step 4: Simplify right side
    35,415.86x = 992,587,784.75
  5. Step 5: Solve for x
    x = 992,587,784.75/35,415.86
  6. Step 6: Final answer
    x = 28,026.65

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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.