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Finding the Fourth Proportional to 3,995.70, 5,506.29 and 3,947.10

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Solution

The fourth proportional to 3,995.70, 5,506.29 and 3,947.10 is: 5,439.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,995.70 : 5,506.29 = 3,947.10 : x
  2. Step 2: Convert to fraction form
    3,995.70/5,506.29 = 3,947.10/x
  3. Step 3: Cross multiply
    3,995.70x = 5,506.29 × 3,947.10
  4. Step 4: Simplify right side
    3,995.70x = 21,733,877.26
  5. Step 5: Solve for x
    x = 21,733,877.26/3,995.70
  6. Step 6: Final answer
    x = 5,439.32

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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.