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Finding the Fourth Proportional to 8,490.79, 12,736.77 and 3,555.46

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Solution

The fourth proportional to 8,490.79, 12,736.77 and 3,555.46 is: 5,333.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490.79 : 12,736.77 = 3,555.46 : x
  2. Step 2: Convert to fraction form
    8,490.79/12,736.77 = 3,555.46/x
  3. Step 3: Cross multiply
    8,490.79x = 12,736.77 × 3,555.46
  4. Step 4: Simplify right side
    8,490.79x = 45,285,076.26
  5. Step 5: Solve for x
    x = 45,285,076.26/8,490.79
  6. Step 6: Final answer
    x = 5,333.43

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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.