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Finding the Fourth Proportional to 3,387.82, 5,056.94 and 3,129.47

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Solution

The fourth proportional to 3,387.82, 5,056.94 and 3,129.47 is: 4,671.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.82 : 5,056.94 = 3,129.47 : x
  2. Step 2: Convert to fraction form
    3,387.82/5,056.94 = 3,129.47/x
  3. Step 3: Cross multiply
    3,387.82x = 5,056.94 × 3,129.47
  4. Step 4: Simplify right side
    3,387.82x = 15,825,501.09
  5. Step 5: Solve for x
    x = 15,825,501.09/3,387.82
  6. Step 6: Final answer
    x = 4,671.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.