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Finding the Fourth Proportional to 30,490.80, 45,731.57 and 8,305.92

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Solution

The fourth proportional to 30,490.80, 45,731.57 and 8,305.92 is: 12,457.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,490.80 : 45,731.57 = 8,305.92 : x
  2. Step 2: Convert to fraction form
    30,490.80/45,731.57 = 8,305.92/x
  3. Step 3: Cross multiply
    30,490.80x = 45,731.57 × 8,305.92
  4. Step 4: Simplify right side
    30,490.80x = 379,842,720.36
  5. Step 5: Solve for x
    x = 379,842,720.36/30,490.80
  6. Step 6: Final answer
    x = 12,457.62

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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.