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Finding the Fourth Proportional to 9,579.88, 13,220.04 and 5,388.16

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Solution

The fourth proportional to 9,579.88, 13,220.04 and 5,388.16 is: 7,435.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,579.88 : 13,220.04 = 5,388.16 : x
  2. Step 2: Convert to fraction form
    9,579.88/13,220.04 = 5,388.16/x
  3. Step 3: Cross multiply
    9,579.88x = 13,220.04 × 5,388.16
  4. Step 4: Simplify right side
    9,579.88x = 71,231,690.73
  5. Step 5: Solve for x
    x = 71,231,690.73/9,579.88
  6. Step 6: Final answer
    x = 7,435.55

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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.