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Finding the Fourth Proportional to 11,157.12, 15,392.64 and 6,958.08

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Solution

The fourth proportional to 11,157.12, 15,392.64 and 6,958.08 is: 9,599.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,157.12 : 15,392.64 = 6,958.08 : x
  2. Step 2: Convert to fraction form
    11,157.12/15,392.64 = 6,958.08/x
  3. Step 3: Cross multiply
    11,157.12x = 15,392.64 × 6,958.08
  4. Step 4: Simplify right side
    11,157.12x = 107,103,220.53
  5. Step 5: Solve for x
    x = 107,103,220.53/11,157.12
  6. Step 6: Final answer
    x = 9,599.54

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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.