Home / 3,921.04-5,411.48-2,152.80

Finding the Fourth Proportional to 3,921.04, 5,411.48 and 2,152.80

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Solution

The fourth proportional to 3,921.04, 5,411.48 and 2,152.80 is: 2,971.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.04 : 5,411.48 = 2,152.80 : x
  2. Step 2: Convert to fraction form
    3,921.04/5,411.48 = 2,152.80/x
  3. Step 3: Cross multiply
    3,921.04x = 5,411.48 × 2,152.80
  4. Step 4: Simplify right side
    3,921.04x = 11,649,834.14
  5. Step 5: Solve for x
    x = 11,649,834.14/3,921.04
  6. Step 6: Final answer
    x = 2,971.11

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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.