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Finding the Fourth Proportional to 7,991.76, 11,991.36 and 3,549.06

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Solution

The fourth proportional to 7,991.76, 11,991.36 and 3,549.06 is: 5,325.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.76 : 11,991.36 = 3,549.06 : x
  2. Step 2: Convert to fraction form
    7,991.76/11,991.36 = 3,549.06/x
  3. Step 3: Cross multiply
    7,991.76x = 11,991.36 × 3,549.06
  4. Step 4: Simplify right side
    7,991.76x = 42,558,056.12
  5. Step 5: Solve for x
    x = 42,558,056.12/7,991.76
  6. Step 6: Final answer
    x = 5,325.24

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1.5x scale

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.