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Finding the Fourth Proportional to 30,616.44, 45,917.04 and 8,428.72

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Solution

The fourth proportional to 30,616.44, 45,917.04 and 8,428.72 is: 12,640.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,616.44 : 45,917.04 = 8,428.72 : x
  2. Step 2: Convert to fraction form
    30,616.44/45,917.04 = 8,428.72/x
  3. Step 3: Cross multiply
    30,616.44x = 45,917.04 × 8,428.72
  4. Step 4: Simplify right side
    30,616.44x = 387,021,873.39
  5. Step 5: Solve for x
    x = 387,021,873.39/30,616.44
  6. Step 6: Final answer
    x = 12,640.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.