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Finding the Fourth Proportional to 5,786.60, 8,679.90 and 4,139.60

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Solution

The fourth proportional to 5,786.60, 8,679.90 and 4,139.60 is: 6,209.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,786.60 : 8,679.90 = 4,139.60 : x
  2. Step 2: Convert to fraction form
    5,786.60/8,679.90 = 4,139.60/x
  3. Step 3: Cross multiply
    5,786.60x = 8,679.90 × 4,139.60
  4. Step 4: Simplify right side
    5,786.60x = 35,931,314.04
  5. Step 5: Solve for x
    x = 35,931,314.04/5,786.60
  6. Step 6: Final answer
    x = 6,209.40

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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.