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Finding the Fourth Proportional to 3,921, 5,411.04 and 2,927.16

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Solution

The fourth proportional to 3,921, 5,411.04 and 2,927.16 is: 4,039.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921 : 5,411.04 = 2,927.16 : x
  2. Step 2: Convert to fraction form
    3,921/5,411.04 = 2,927.16/x
  3. Step 3: Cross multiply
    3,921x = 5,411.04 × 2,927.16
  4. Step 4: Simplify right side
    3,921x = 15,838,979.85
  5. Step 5: Solve for x
    x = 15,838,979.85/3,921
  6. Step 6: Final answer
    x = 4,039.53

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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.