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Finding the Fourth Proportional to 6,991.90, 10,487.88 and 2,609.30

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Solution

The fourth proportional to 6,991.90, 10,487.88 and 2,609.30 is: 3,913.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.90 : 10,487.88 = 2,609.30 : x
  2. Step 2: Convert to fraction form
    6,991.90/10,487.88 = 2,609.30/x
  3. Step 3: Cross multiply
    6,991.90x = 10,487.88 × 2,609.30
  4. Step 4: Simplify right side
    6,991.90x = 27,365,992.51
  5. Step 5: Solve for x
    x = 27,365,992.51/6,991.90
  6. Step 6: Final answer
    x = 3,913.95

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Similar ratio
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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.