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Finding the Fourth Proportional to 8,679.40, 11,965.02 and 5,690.05

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Solution

The fourth proportional to 8,679.40, 11,965.02 and 5,690.05 is: 7,844.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.40 : 11,965.02 = 5,690.05 : x
  2. Step 2: Convert to fraction form
    8,679.40/11,965.02 = 5,690.05/x
  3. Step 3: Cross multiply
    8,679.40x = 11,965.02 × 5,690.05
  4. Step 4: Simplify right side
    8,679.40x = 68,081,510.80
  5. Step 5: Solve for x
    x = 68,081,510.80/8,679.40
  6. Step 6: Final answer
    x = 7,844.03

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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.