Home / 7,921.60-11,872.80-3,534.40

Finding the Fourth Proportional to 7,921.60, 11,872.80 and 3,534.40

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Solution

The fourth proportional to 7,921.60, 11,872.80 and 3,534.40 is: 5,297.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.60 : 11,872.80 = 3,534.40 : x
  2. Step 2: Convert to fraction form
    7,921.60/11,872.80 = 3,534.40/x
  3. Step 3: Cross multiply
    7,921.60x = 11,872.80 × 3,534.40
  4. Step 4: Simplify right side
    7,921.60x = 41,963,224.32
  5. Step 5: Solve for x
    x = 41,963,224.32/7,921.60
  6. Step 6: Final answer
    x = 5,297.32

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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.