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Finding the Fourth Proportional to 7,994.88, 11,988.40 and 3,609.28

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Solution

The fourth proportional to 7,994.88, 11,988.40 and 3,609.28 is: 5,412.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,994.88 : 11,988.40 = 3,609.28 : x
  2. Step 2: Convert to fraction form
    7,994.88/11,988.40 = 3,609.28/x
  3. Step 3: Cross multiply
    7,994.88x = 11,988.40 × 3,609.28
  4. Step 4: Simplify right side
    7,994.88x = 43,269,492.35
  5. Step 5: Solve for x
    x = 43,269,492.35/7,994.88
  6. Step 6: Final answer
    x = 5,412.15

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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.