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Finding the Fourth Proportional to 5,739.64, 8,611.88 and 3,139.54

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Solution

The fourth proportional to 5,739.64, 8,611.88 and 3,139.54 is: 4,710.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,739.64 : 8,611.88 = 3,139.54 : x
  2. Step 2: Convert to fraction form
    5,739.64/8,611.88 = 3,139.54/x
  3. Step 3: Cross multiply
    5,739.64x = 8,611.88 × 3,139.54
  4. Step 4: Simplify right side
    5,739.64x = 27,037,341.74
  5. Step 5: Solve for x
    x = 27,037,341.74/5,739.64
  6. Step 6: Final answer
    x = 4,710.63

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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.